Abstract: A hollow doll in which the doll's head is formed of elastomer material, and is blow molded to include a downwardly extended annular lip having a semicircular groove at the front of the neck. The lip is constructed to fold inwardly, and to engage a bead or flange on the neck portion of the body, thereby securing the head to the body. It is contemplated, in accordance with the present invention, that other appendages can be secured to a primary body in a similar manner.

Abstract: A method of fixing connection parts of rubber offshore structures is disclosed. The connection part of the rubber offshore structure is firmly fixed to a corresponding portion of a connecting part by means of a metal fixing member by covering the outer surface of the metal fixing member, after fastened, with a liquid rubber composition curable at room temperature.

Abstract: Semiconductor components, as for LSI-circuits are produced in such a manner that epitaxial layers as well as buried layers are dispensed with while an increased manufacturing yield and an increased structural packing density is achieved via an oxide insulating technique. The process involves applying and structuring a first insulating layer, such as composed of Si.sub.3 N.sub.4, onto a semiconductor substrate having a first zone of one conductivity type therein, etching insulating grooves into the substrate areas not covered with the first insulating layer and filling such grooves with a second insulating layer, such as composed of SiO.sub.2, which is thicker than the first insulating layer, and then emplacing the various semiconductor structures at select surface areas between spaced-apart areas of the second insulating layer so as to complete the semiconductor structure.

Abstract: A method for applying a protective covering for a semi-conductor device which comprises a circuit board having formed thereon a conductive pattern on which a chip of the semi-conductor device is mounted and electrically connected to said conductive pattern, an insulating resin film having a low surface energy to provide a repellent property and formed on said circuit board around the chip of the semi-conductor device by a printing technique, and a resin molded seal formed on said circuit board to conseal said chip within a space defined by said insulating resin film, the flow of resin being blocked by the repellent property of said insulating resin film during a molding process.

Abstract: A rotor assembly for a dynamoelectric generator having a spider sub-assembly that is rotatable around a non-vertical axis; characterized by having a plurality of articulated key assemblies positioned in aligned keyways formed, respectively, in the circumferential surface of the spider sub-assembly and in the inner circumferential surface of an annular laminated rotor rim. A base member in each of the key assemblies is formed to exceed by a predetermined length the normal, i.e., unheated, spacing between the rotor rim and the spider. The rotor rim is heated to expand it radially so the base members of the key assemblies can be inserted in the aligned axial keyways in the rim and spider, then the rim is cooled to heat-shrink it against the base members of the key assemblies.

Abstract: A method of making a thin film magnetic head assembly having a spaced substrate and superstrate with a thin film magnetic transducer mounted therebetween by the steps of positioning at least one spacing member between the substrate and superstrate, placing a quantity of insulating bonding material of selected characteristics adjacent the spaced substrate and superstrate and controllably heating the substrate, superstrate, thin film magnetic transducer and spacing member sub-assembly to a bonding temperature located in a bonding temperature range and maintaining the sub-assembly at a bonding temperature to enable the bonding material to substantially fill the space by capillary action thereby encapsulating the thin film magnetic transducer bonding the substrate, superstrate and thin film magnetic transducer into an integral assembly is shown.

Abstract: A cable connector crimping apparatus is disclosed for use in combination with a standard vise or the like including means for positioning the apparatus on the front surface of one of the jaws of the vise, stop means for preventing the closure of the vise beyond a certain point so as to protect the connector from damage once the crimping of the connector has been completed, and including secondary spacing means for insuring that pins extending from the connector are also not damaged during the crimping of the cable onto the connector.

Abstract: A guard for the saw chain of a chain saw is provided by a group of "U" shaped channel members which are disposed in telescoping relationship over the upper reach of the saw chain and another group of similar channel members which are disposed in telescoping relationship over the lower reach of the saw chain. The channel members are captured and retained in the contour plate around which the saw chain is entrained. Snap-out buttons limit the maximum extension of the telescoping sections. Arrangements of springs urge the telescoping sections forwardly so that they extend over the saw chains. The snap-out buttons also provide bias in addition to that provided by the springs against retraction. Bars are pivotally mounted on the forwardmost of the channel members. These bars pivot against stops when they engage the log or other work to be sawed. The force applied to the telescoping sections through the bars retract the sections and gradually exposes the saw chain.

Abstract: A dart depth gauge comprises two flat members pivotally connected with one another. The two members have index points which are spaced from the pivot and are movable toward and away from one another by relative pivotal movement of the members. One of the members has along one edge a scale which is calibrated in terms of pattern sizes. The other member has thereon a series of curves, each of which is identified by a breast cup size. The curves are laid out so that when the members are pivoted relative to one another to bring the calibration of a selected pattern size into coincidence with a selected cup size curve, the distance between the index points is the correct depth of dart for the selected pattern size and selected cup size.

Abstract: A chalk line device for storing and dispensing a chalk line, and also functioning as a plumb bob and arc scribing instrumentality. The device includes a housing formed of a pair of cooperating side plates which define a chalk and reel-receiving chamber having openings at opposite ends thereof. A centrally mounted chalk line reel is rotatably mounted within the chamber between the end openings. An arc scribing disk is mounted at one end of the chamber to project partially through one of the end openings, and a chalk line is extended from the reel through the opening at the other end of the chamber.

Abstract: An auxiliary device for laying flexible wall and floor coverings includes an elongated angle plate having a supporting surface for the material to be cut to size and a pressure strip having a lower pressure surface of approximately the same length as the supporting surface and which has a cross-sectional profile which is configured to complement the profile of the supporting surface. The supporting surface has at one end a wedge-shaped end portion, the outer edge of which defines a supporting edge, and a cutting edge defined at its opposite end, which edges lie in a base plane. The angle plate also includes a part having a locating edge disposed parallel to the cutting edge. The angle plate in cross-sections lies substantially within an imaginary triangle, with its cutting edge, supporting edge and locating edge passing through one corner of the triangle.

Abstract: An instrument to indicate disalignment of a bicycle wheel or the like spoked wheel and characterized by a single feeler or guide engaging both the inner side and a lateral side of the rim, thus avoiding the need to remove the tire and connected to an indicating needle which indicates both the lateral and the circumferential disalignments in a convenient manner. This instrument includes a casing having a viewing window; the needle is pivotable in two orthogonal directions relative to the viewing window, and the latter is divided into four quadrant zones by lines extending parallel to the two orthogonal directions, and each quadrant zone is distinctive of one of the four modes to adjust the spokes of a wheel; tighten the left spoke, tighten the right spoke; release the left spoke; and release the right spoke.

Abstract: A sighting device mounts upon a flat horizontal web secured along the top of the barrel of a gun. It is composed of an elongated vertically-oriented strip which includes a plurality of downwardly-projecting ears individually spaced along the length of the strip. A corresponding plurality of blocks mount the ears respectively to different successive portions of the web.

Abstract: An azimuth directional synchro output is provided for a gyroscopic compass, the compass consisting of a pendulous gyrosphere floating within a spherical cavity containing an electrically conductive fluid. By forming one electrode that carries power through the fluid to spin the gyroscope rotor as a band of sinusoidally varying width, four cooperating electrodes equally spaced about the instrument case supply azimuth position data to excite a selsyn data transmitter system. The currents collected by the four cooperating electrodes are proportional to the varying resistances of the respective fluid paths. They generate a vector field within the selsyn system which establishes outputs representing true azimuth bearing within the three selsyn output leads.

Abstract: Apparatus for calibrating the magnetic azimuth detector of a gyromagnetic compass system utilizes the system gyro to provide a plurality of heading references to which the corresponding heading outputs of the magnetic azimuth detector are compared to provide cardinal and inter-cardinal error data from which one cycle and two cycle compensation coefficients are derived. The gyro heading references are compensated for gyro drift in accordance with the proportionate drift occurring with respect to a particular heading reference with respect to the total gyro drift occurring during the calibration procedure in accordance with coincident initial and final heading reference points. The calibration is effected by orienting the aircraft in which the gyromagnetic compass system is installed at the plurality of headings to provide the gyro reference and magnetic azimuth detector data.

Abstract: An inert gas chamber for use in continuously curing oxygen sensitive coating compositions by the application of radiation, employs a jet of inert gas to displace the air boundary layer on the coated substrate as the coated substrate moves into the chamber. The coated substrate is also blanketed with inert gas and subjected to the radiation. The use of inert gas to cool the window of the electron beam accelerator may be used in the chamber, thus avoiding ozone-based pollution.

Abstract: In a process that involves use of a fluidized bed of solid particulate material wherein fluidization is obtained by passge of a gas through the bed, and the bed is stabilized by including discrete magnetizable particles in the bed and applying a substantially uniform magnetic field to the bed, temperature gradients that occur in the bed when the process in which the fluidized bed is used involves release or absorption of heat are reduced by periodically removing the magnetic field in a cyclical fashion. The period of magnetic field removal is long enough to destabilize the fluidized bed with respect to the positioning of fluidized particles so that the particles will move about in the bed, but the period of removal is not so long as to permit the unstabilized bed to exhibit a boiling or bubbling effect. The ratio of "on" time to "off" time is generally within the range of from about 4 to 1 to about 4000 to 1.

Abstract: A seed cotton drying system of the parallel flow tower type, having vertically spaced horizontal shelves alternately extending from opposite sides of the tower to locations near but spaced from the opposite side to define a continuing zig zag cotton flow path from the top of the bottom through which the cotton travels impelled by the conveying heated air. The spacing of the shelves increases from the top to the bottom, and fresh hot air is introduced between the shelves where there is an increase in shelf spacing.

Abstract: The moisture content of tobacco, particularly greenleaf tobacco, is reduced to an accurately determined value by conveying a continuous tobacco stream through three successive sections of a transporting system wherein the tobacco is contacted by air currents. In accordance with a first embodiment, a relatively hot current of air is conveyed countercurrent to the direction of tobacco transport in the first section of the transporting system; in the second section, the flow of hot air is concurrent with the direction of tobacco transport; in the third section, the tobacco is contacted by relatively cool air having a relatively high moisture content. The air which is conveyed through the third section can be withdrawn from the first section, and the temperature of air in the second section is regulated as a function of deviations of moisture content of partially or completely conditioned tobacco from a desired moisture content.

Abstract: A display device is disclosed which employs a magnetic panel. The magnetic panel is formed by two oppositely arranged substrates at least one of which is transparent or semi-transparent. The space between the two substrates is filled with a dispersing liquid having a yielding value higher than 5 dyne/cm.sup.2. The dispersing liquid is prepared with fine magnetic grains, a coloring agent, a dispersing medium, and a fine grain thickener. Preferably, a multi-cell structure is provided in the space between the two substrates and the substrates are sealed to the multi-cell structure to form a plurality of independent display cells. A displaying magnet in the form of a pen is used to form a display by causing the fine magnetic grains to migrate to the front of the magnetic panel. An erasing magnet is slidably disposed at the rear of the magnetic panel.

Abstract: A memorizing aid convenient to memorize foreign words includes an endless tape passing around two rolls and intermittently rotated by pressing a pushbutton. The tape bears information to be memorized, the information being seen through a pair of windows formed in a casing.

Abstract: A skiboot has a one-piece vamp secured to the sole of the boot and having a closed toe portion and an upwardly and backwardly opened heel portion. A one-piece forwardly U-shaped rear upper part is pivoted on the vamp at the heel portion thereof and has flaps which lie ahead of the pivots. A tongue is secured to and extends upwardly from the vamp inside the rear upper part between the flaps thereof and has above these flaps a forwardly projecting shoulder. A closure is carried on these flaps for securing them together in front of the tongue underneath the shoulder. The rear part is pivoted back for putting on or taking off the boot, but in use is pivoted forwardly and held in place under the shoulder of the tongue with the closure of the boot tightening the rear part about the ankle of the user.

Abstract: A centrifugal snow blower having a frame, a fan rotatable about a central axis supported on the frame and a housing surrounding said fan having a peripheral wall defining at least an opening in direction of clearing and a duct extending tangentially for the ejection of snow. The housing is supported for rotative adjustment about the central axis by a central bearing journaling the housing to said frame, an annular guide member secured to the housing concentric with the central axis and at least one releasable braking device supported on the frame for cooperation with the guide member to fix said housing in selective rotative positions.

Abstract: A device for arranging and transporting articles of laundry to feeder equipment for a flat ironing machine including a plurality of paired heads which are spaced apart pendent from a continuous chain. Each of the heads is provided with a pair of gripping devices for tautly holding a portion of the articles of laundry near the edges thereof whereby the articles can be picked off the heads by a feeder for continuous delivery to a flat ironing machine.

Abstract: An index tab for a file folder includes an integral base member adapted to be affixed to the file folder. The base member includes a relatively flat base portion engageable with a surface of the file folder, the base portion having a pair of opposed strip engageable notches at opposite edges of the member. The base portion further includes at least one ear means bent about the base portion and engageable with an opposite surface of the file folder. A rotatable strip of flexible material circumscribes the base portion and engages within the opposed strip engageable notches. The strip carries a series of indentifying indicia. The ear means, in one version, can be bent about a fixed axis and a point on the strip is rotatable within a plane which is perpendicular to the fixed axis. In another version, a point on the strip is rotatable within a plane which is parallel to the fixed axis.The rotatable strip can include alphanumeric indicia such as numerals, months, years, dates, and color.

Abstract: A snag-resistant fishing lure of simple three-piece construction has a body which normally conceals a hook until such time as a fish strikes and exposes the tip of the hook. The lure has an elongated rigid back member and a belly-like member fabricated of relatively thin flexible material and mounted below the back member to form a cavity for containing and concealing the tip of the hook. The bottom of the belly member has a slot which registers with the tip of the hook and through which the tip protrudes when a fish strikes the lure and compresses the belly against the back ahead of the tip. The tip lies within the slot and is angled downwardly and forwardly for cooperating with the rigid back to provide a self-setting action when struck by a fish. The lure is designed to float when stationary on the water; however, the leading ends of the back and belly members have an upwardly and rearwardly inclined surface designed to cause the lure to dive when pulled through the water.

Abstract: A vacuum package containing a single dose of the material to be dispensed is held in a frame so that it can be cut open by a spring-loaded sliding blade. The blade is held off the package against the force of the spring by a timer, which is an arrangement of a metal shear pin in contact with another metal of lower electrode potential. Immersion of the timer in an electrolyte such as sea water initiates galvanic action which causes the shear pin to corrode to failure close to a predetermined time.

Abstract: A crawfish trap which includes a pair of frame members, one of which is fitted with a receiving loop and the other carrying a mating hook for engagement with the receiving loop, both of the frame members having a pair of legs and feet extending from the point of attachment of the loop and hook, respectively, to support the trap netting. The open mesh netting is fitted to the frame and covers the bottom and a portion of all four sides formed by the frame members to define a generally truncated pyramid with an opening in the top of the trap immediately below the frame loop and hook to permit entry of the crawfish. The trap is designed to be submerged in a body of water and located by a float and float line attached to the frame members, which float and line also serve to permit the trap to be lifted from the water for collection of the entrapped crawfish.

Abstract: An educational toy comprised of a kit of parts, and including blocks having slots in their faces, and resilient strips to fit into the slots and adapted to be retained in the slots by bending of the strips.

Abstract: An amusement device provides a skating rink for use with figure toys or the like. The amusement device includes a plurality of rotatable disc-shaped rink portions mounted on the base adjacent a panoramic setting. The setting includes a recirculating device which receives the figure toys from one end of the rink and elevates the figure toys to a chute which delivers the figure toys generally to a position at the opposite end of the rink. A ski lift mechanism including a plurality of chairs is adapted to carry the various figure toys at an elevated position over the top of the rink. A common linkage drives the rotatable rink portions, the recirculating system, and the ski lift mechanism.

Abstract: An improvement relating to a toy flying saucer having a double skinned body defining lower and upper wall portions joined proximate the rim of the toy flying saucer body. The upper and lower walls, in one embodiment, are normally urged in close proximity and may be manually separated so as to form a variable volume air chamber therebetween. An orifice in one of the walls is provided with a noise-making element such as a whistle or a siren. Prior to launching the flying saucer, the upper and lower walls are manually separated so as to fill the chamber therebetween with air which is allowed to escape during flight through the orifice provided with a noise emitting element. Alternatively, the double skinned body is constructed such that the upper and lower walls are normally urged away from each other such as to form an air chamber therebetween which can be manually collapsed prior to launching of the toy flying saucer.

Abstract: A moving toy includes a plurality of articulated, body-forming members configured as a crawling animal. A wheeled, forward member includes drive means for propelling the toy and an actuating means with radially extending arms. The actuating means contacts a lever on an adjacent body forming member to intermittently pivot the members, thereby simulating an arching or undulating motion in a rearward portion of the toy.

Abstract: This disclosure relates to a novel game call which utilizes in a reed assembly, a reed holder, a pair of reeds and a voice channel, the reed assembly being telescopically received within a barrel and the barrel having a shoulder and a tapered surface constructed and arranged so as to uniform and control pitch from game call to game call and/or upon disassembly and reassembly of a game call; the game call being further provided with unique means for maintaining the pair of reeds sandwiched between the reed holder and the voice channel, and one of the reeds having a surface finish rendering it stiffer than an opposite surface thereof with the stiffer surface opposing the remaining reed to again assure desired and uniform pitch.

Abstract: Seeds of alloplasmic wheat, which contain at least one specific nuclear gene (Ms) and a cytoplasm which interacts with the specific nuclear gene (Ms) or genes (Ms Ms) to maintain the plant fertile, are treated by a mutagenic agent and, if necessary selfed to obtain seeds having embryos that contain only mutated nuclear genes (ms ms). The seeds having embryos without at least one specific nuclear gene (Ms), produce plants which are male sterile (A-line). The A-line plants are pollinated with pollen from euplasmic or alloplasmic wheat (R-line), having chromosomes including specific nuclear genes (Ms Ms), to produce hybrid wheat seeds. The available A-line seeds may be multiplied by crossing the A-line plants with B-line plants to produce A-line seeds.

Abstract: A receptacle for growing plants includes a pot and a bowl-shaped inset piece or liner disposed in the pot. The floor of the pot has a plurality of upstanding tubular projections each having a passage open to the underside of the pot ands closed at its upper end. This arrangement allows simple and secure attachment of casters, feet, or other supports to the underside of the pot without destroying the aesthetic appearance of the pot itself. Various other projections and tubular members serving various technical purposes can also be provided in a similar manner without destroying the aesthetic appearance of the receptacle. The inset piece is adapted to conform to and cooperate with the projections and technical devices provided for a particular receptacle.

Abstract: An automotive fuel pump having a return channel from the pressure side to the suction side thereof, comprising an opening in the housing independent of the outlet channel and opening to the inlet channel. The return channel is located in the area of the pressure side armature bearing. This construction enables elimination of gas bubble formation when the fuel being pumped is warmed.

Abstract: A polishing machine comprises a vertically movable surface on which is mounted a driving motor for rotating a support supporting on an axis of oscillation the gearbox an electric motor associated with an eccentric means urging the said motor to pivot on the axis of oscillation, the output shaft of the motor being provided with a spindle carrying a work tool normally occupying an eccentric position relative to the axis of the support. The machine has application in the polishing of the internal impression of a mould.

Abstract: Apparatus for polishing or grinding an optical lens through multi-directional, coplanar movement of a lens support frame relative to a polishing head. A pair of drive cams are rotated with an eccentrically mounted shaft while mounted upon orthogonal alignment braces for converting the rotation of the cam into a circular point pattern. A lens support table upstands from each cam for the support of a lens thereon in abutting relationship with a grinding or polishing head thereabove and is driven in said circular point pattern while in engagement therewith. The polishing head and cam base are likewise bidirectionally driven in orthogonal directions for permitting polishing of the entire surface area of the lens mounted thereon. In this manner lens polishing or grinding may be effected in a totally planar configuration for preventing lens slapping and edge aberation.

Abstract: A vibratory polishing machine for minerals, gem stones and the like in which a carriage is resiliently mounted to a base and is provided with a motor fixedly mounted to the carriage. The motor output shaft is eccentrically connected via a crank to a drum supported on the carriage. Activation of the motor vibrates one end of the drum while the other end of the drum pivotally mounted on the carriage remains relatively stationary. The drum vibration causes materials inside the drum to rotate continuously in a circular path providing a polishing action.

Abstract: A glass house or plant house having the roof and walls of sawtooth configuration, the roof having generally vertical glass areas facing the equator, and sloping opaque sections inclined to the horizontal equal to the rays of the mid-day winter sun. The walls have generally vertical glass panels sloping outwardly at the top and jointed by horizontal opaque sections to allow penetration of the morning and evening sun but decreasing amounts of the day time sun.

Abstract: An improved window structure is provided which has an external and internal frame surrounding a plural glazed sealed element. The internal frame has abutting joints. The junction between the abutting frame members is accomplished by a screw engaging a tongue. The tongue is capable of movement to compensate for temperature variations or relative movement between frame members.

Abstract: A system of reinforcing gussets or strips is provided for strengthening a burial vault liner against flexure under the load presented by flowable cementitious vault forming material. The reinforcing gusset system prevents the parts of the vault liner, the vault liner lid and body, from flexure such as would degrade the seal between the vault body and vault lid.

Abstract: A sound-absorbing panel having a front and a rear sheet, the front sheet being corrugated and perforated; a filler of particles of elastic material lies between the sheets.

Abstract: A flat rectangular holding frame member is provided on one side with adhesive tape adjacent the edge thereof, which is covered by a peel-off film which, upon removal, allows the frame to be applied to the surface of a wall for adherence thereto; and on the other side, is provided with snap fastener means for removably holding a flat, domino decoration-bearing rectangular face member which is similar in size and shape to that of the frame member, having mating snap fastener means on the back thereof, in place thereon, so that a wall decorated with a plurality of different domino spots, or blanks, can be rearranged on the frame member at will without removing the frame members from the wall surface.

Abstract: The arrangement shown and described herein is used to seal a closure structure of a vehicle body. A weatherstrip including metal strip inserts is extruded to include not only the usual hollow deflection bulb, but also a hollow flange sealing bulb, formed in a predetermined shape on the center portion of the side surface opposite the deflection bulb. When the retention portion of the weatherstrip around the metal strip inserts is crimped to form its operational "U" shaped recess, the flange sealing bulb is located at the bottom of the recess, substantially uniformly filling the space heretofor selectively filled with a bead of butyl mastic sealant. Once the thus formed weatherstrip is installed on a body closure flange or ledge, the edge of the flange or ledge depresses the hollow sealing bulb such that the latter effectively and uniformly seals off the inside of the flange or ledge from the outside thereof.

Abstract: A concealed fastener clip for attaching a plurality of panels disposed in an edge-to-edge relationship to a support frame. The concealed fastener comprises a body portion of generally C-shaped cross section which generally follows the annular space between edges of adjacent panels. One edge of the body portion of the fastener comprises a standoff leg terminating in a lateral flange, and means are provided to secure the lateral flange to the support frame when the fastener is sandwiched between abutting panels.

Abstract: A corrugated roofing sheet has special elevations formed in the wave crest of the sheet, the elevations being contoured to increase the sheet's rigidity while permitting the elevations to function as a ladder. The elevations provide effective rigidfying while leaving the valleys of the sheet corrugations free for drainage.

Abstract: A bearing construction for the end of a flat truss having top and bottom wood chord members and inclined metallic intervening tension web members terminating in apertured load transfer flanges secured to at least one side of the chord members by toothed connector plates overlying the flanges with the teeth intermeshing the apertures and embedded in the chord members. A stress transferring channel overlies the end of the top chord and the channel web has teeth embedded into the top of the chord. The legs of the channel abut the sides of the chord under the flanges and connector plates and are apertured to intermesh with connector plate teeth extending through the load transfer flanges into the sides of the chord.

Abstract: An end structure is provided for a panel having two metallic sheets separated by an insulating core, in which a portion of each of the metallic sheets extends beyond the insulating core to form sheet ends, a unitary metallic member is joined to one of the sheet's ends, and insulating means are provided to both thermally and electrically insulate the sheet ends from each other. The unitary metallic member has a joining surface including a flange designed to be fastened to a corresponding flange of a like panel end structure to form a joint which is recessed with respect to the metallic sheets, and which maintains thermal and electrical insulation between the two metallic sheets of each panel.

Abstract: A free span arch structure is illustrated including transversely spaced elongated flexible structural sections flexed from a substantially straight configuration when unflexed into a substantially parabolic configuration without exceeding the yield point of the structural sections so as to impart a permanent set thereto. Means are provided for supporting and for restraining the structural section adjacent the ends thereof against outward and downward movement retaining the sections flexed in the parabolic configuration. The method contemplates lifting structural sections, which are illustrated in the form of aluminum pipes, by exerting a lifting force as by a crane intermediate the ends thereof in a medial portion, and then raising an intermediate portion of the pipe by the application of the lifting force while supporting the opposed ends of the pipe as on the ground or otherwise as in the case of a roof, on the walls.