Abstract: A rollable game playing piece, and a method of an individual utilizing the playing piece in playing games. A rigid body disc has a top surface provided as a friction surface, and has a number of casters or the like affixed inside and upwardly of its bottom for mounting the body disc so that it is stable and freely rollable over a flat surface. The playing piece has a substantially non-planar hemispheric profile across the entire top thereof. An individual engages the top friction surface with one of his feet, and propels the playing piece toward a net by flexing his leg at the knee and/or hip to apply a force to the playing piece, and then releasing engagement of his foot with the top surface of the playing piece.

Abstract: A pipette having an axially displaceable piston is provided with a transversely displaceable stopping device for limiting the displacement of the piston in accordance with a volumetric scale marked on the stopping device. Operation of the piston and stopping device can be done with one hand.

Abstract: Apparatus for wrapping articles in heat sealed thermoplastic stretchable film consists of a first conveyor for carrying an article forward while progressively enclosing it with film drawn from a film supply, joining the margins of the film together to enclose the article in an elongated tube of film, cutting the film so as to provide equal amounts of excess film at each end of the article, using a vacuum inlet to pull the trailing portion of film to one side of the article so that a transverse rod, moving faster than the article, can fold the trailing portion against one side of the article, folding the leading portion of film against the same side by means of a roller, and finally moving the article into contact with a heated belt to seal the film.

Abstract: Chemically stable p-isopropenyl phenol is produced in the form of a solution by contacting p-isopropenyl phenol, in the form of a gas or a liquid obtained immediately after condensation of said gas, with a polar solvent such as an alcohol, an ester, or an acid amide. The resultant solution of p-isopropenyl phenol can be used as the starting material for subsequent reaction to obtain useful compounds such as hydroquinone. Alternatively, p-isopropenyl phenol may be isolated in crystalline form by adding to the solution a poor solvent for the phenol such as water, or by cooling the solution.

Abstract: Urea synthesis effluent obtained by reacting carbon dioxide with ammonia is subjected to a plurality of decomposition stages, e.g., three stages, to decompose and recover the unreacted ammonium carbamate with stepwise reduction of pressure, and the off-gas is absorbed in an absorbent in each stage and is recovered. The aqueous urea solution from the final decomposition stage is concentrated, water vapor generated upon said concentration is condensed, and the condensate containing small amounts of ammonia and carbon dioxide is stripped with steam recovered from the high pressure absorption zone. The steam discharged from the stripping step is introduced into the final decomposition stage to directly heat the urea synthesis effluent.

Abstract: The process for the production of carnitine hydrochloride which includes reacting a .alpha.-haloacetoacetanilide having the formula:XCH.sub.2 COCH.sub.2 CONYC.sub.6 H.sub.5where X is a halogen atom and Y is a hydrogen atom, a phenyl group, a benzyl group or an alkyl group having 1 to 8 carbon atoms, with trimethylamine, a .gamma.-trimethylammonium acetoacetanilide halide resulting. The .gamma.-trimethylammonium acetoacetanilide halide, is hydrogenated, a .gamma.-trimethylammonium-.beta.-hydroxybutyric acid halide resulting. The .gamma.-trimethylammonium-.beta.-hydroxybutyric acid halide is converted by means of aqueous hydrochloric acid into the carnitine hydrochloride.

Abstract: .Iadd.A dental handpiece comprises an air driven turbine rotor provided with a chuck to removably hold a dental bur and rotate it at extremely high speed. The rotor is mounted on anti-friction bearings within a capsule which is removably received within a housing to permit replacement of the capsule and turbine as a unit. The fluid outlet from the turbine is restricted sufficiently to ensure that a portion of the fluid is exhausted through the bearings and openings in the housing to prevent egress of foreign matter into the interior. .Iaddend.