Abstract: A vapor electrical conductivity cell with sensing plates mounted on insulrs exposed to the vapor. Vapor condensation on those insulators cause errors in the conductivity measurements. The improvement of the invention keeps the insulators at a temperature higher than the vapor. The leakage errors are therefore reduced considerably.

Abstract: An improved method of testing a particulate filter. This is accomplished by assing a salt nuclei coated with isopropyl isostearate.

Abstract: An improved process of passing an aerosol mixture through a filter. The asol mixture solely contains in percentage, by volume, of about:______________________________________ % Chemical ______________________________________ A. 60-66 isostearic acid B. 13-17 isooleic acid C. 1-3 isopalmitic acid D. 8-10 stearic acid E. 6-12 oleic acid.

Abstract: An improved method of testing a particulate filter. This is accomplished by assing a salt nuclei coated with a mixture containing isostearic acid, isopalmatic acid, myristic acid and palmitic acid through the filter to be tested.

Abstract: An improved process of passing an aerosol mixture through a filter. The asol is generated by nebulization of the mixture prior to penetration of the filter. The aerosol mixture solely being a poly-olefin having a content of chain hydrocarbon in %, by volume, of about:______________________________________ % Carbon chain length ______________________________________ 0.6 20 82.1 30 16.0 40 1.0 50 2.0 60.

Abstract: An improved method of testing a particulate filter. This is accomplished by assing the following ester mixture on salt nuclei consisting essentially in percentage, by volume, of about:______________________________________ % Chemical ______________________________________ 58 methyl oleate 24 methyl stearate 14 methyl linoleate 4 methyl palmitate.

Abstract: An improved process of passing an aerosol mixture through a filter. The aerosol mixture solely containing the following in percentage, by volume, of about:______________________________________ % Chemical ______________________________________ 71 oleic acid 8 palmitoleic acid 7 linoleic acid 4 palmitic acid 3 myristic acid 3 myristoleic acid 1.5 linolenic acid 1.5 margaric acid 1 stearic acid.

Abstract: An improved process of passing an aerosol mixture through a filter. The asol mixture solely being a poly alpha olefin having a content of hydrocarbon % by volume of:______________________________________ % Carbon atoms, chain length ______________________________________ A. 30.9 30 B. 42.8 40 C. 20.4 50 D. 4.8 60 E. 1.1 70.

Abstract: An improved process of passing an aerosol mixture through a filter. The asol mixture solely being a poly-alpha olefin having a content of chain lengths in % by volume of about:______________________________________ % Carbon atoms, chain length ______________________________________ 0.6 20 82.1 30 16.0 40 1.0 50 2.0 60.

Abstract: An improved method of testing a particulate filter. This is accomplished by assing a salt nucleus coated with a composition containing a poly-alpha olefin having chain length in %, by volume, of about 97-99% of 20 carbon atoms, and about 3% of 30 carbon atoms.

Abstract: An improved process of passing an aerosol mixture through a filter. The asol is generated by nebulization of the mixture prior to penetration of the filter. The aerosol mixture being in %, by volume, of about:______________________________________ % Chemical ______________________________________ 70-76 isostearic acid 6-7 isopalmitic acid 7-11 myristic acid 4-5 palmitic acid.

Abstract: The invention includes an apparatus for protecting plants from frost. A jet urbine engine has an input into which a first liquid and a second liquid are injected into the exhaust stream of the engine. The jet engine also has an exhaust nozzle supplying an aerosol of the first liquid microencapsulated in the second liquid. The aerosol is dispersed about the plants to be protected from frost thereby to form a mist which acts as a protective radiation barrier for the plants. The invention also includes a method for protecting plants from frost.

Abstract: An electrooptical system and technique for direct quantitative measurement of the mass concentration of monodisperse aerosols by means of filling an enclosed chamber with a cloud or a sequence of separate clouds of essentially transparent and spherical, aerosolized particles or droplets of known density and known or selectively controlled particle size. While within the confines of the chamber the cloud, or each of the sequence of clouds, of aerosolized particles is maintained in a homogeneous condition and irradiated with a beam of high-intensity and constant wavelength irradiation selected to possess a wavelength to particle size ratio wherein attenuation of the irradiation will be almost exclusively, if not nearly entirely, attributable to optical scattering.

Abstract: A gas comparison probe contains first and second sensor elements isolated om each other. Air is drawn across a surface to be monitored and directed onto the first sensor element. Air is drawn from a location spaced away from the surface to be monitored and directed onto the second sensor element. A flow constrictor in the air flow path to one of the sensor elements is used to calibrate the outputs of the two sensor elements under known conditions before attempting to monitor air flow which may contain a gas to be detected.

Abstract: An apparatus and method are disclosed for measuring the conductivity or ner of water ion clusters present in a moist air environment. A test chamber is utilized for operatively simultaneously holding a "dummy" reference cell and a "large" conductivity cell having substantially the same leakage resistance. The cells are designed to have "cell factor" ratios substantially different from each other. A D.C. power source with an in series vacuum-tube voltmeter is used to alternately measure the voltage drop of each cell under the similar variable ambient conditions. The conductivity or number of ion cluster present in the test environment is determined by a calculation using voltage compensated values and by graphical extrapolation.

Abstract: An apparatus and method for measuring the liquid water content of a cloud fog utilizes an environmentally controlled test chamber having a plurality of oppositely disposed windows selected to be optically transparent at a chosen wavelength of radiation. The windows of the chamber are positioned intermediate an infrared source and a wavelength scanning radiometer. An optical band pass filter is selected to pass radiation of a specific wavelength making the instrumentation substantially independent of cloud droplet size distribution enabling the measurement of only liquid water rather than water vapor.

Abstract: A fabric moisture detector and method is provided. The detector has a supt insulating structure, and a pair of electrodes, which have a pair of opposite faces separated by a gap of selective thickness, such as four inches or ten centimeters. The detector also has a current sensor, for measuring the current through the gap during the application of a relatively high voltage, such as about 10,000 volts to 60,000 volts for a ten centimeter gap. The voltage applied using a ten centimeter gap can be between about 1,000 volts per gap centimeter to 6,000 volts per gap centimeter. The process includes the steps of measuring the gap current during the application of the specified voltage, whereby a dry fabric or bare electrodes yields substantially no current and a wet fabric yields a peak current.

Abstract: An apparatus and method for accelerated drying and decontamination of wet fabric and material. A pair of metal electrodes electrically isolated from each other by a "U" shaped insulating frame is used to hold the wetted fabric in an electric field of between 10.sup.3 and 10.sup.4 volts per centimeter.

Abstract: An improved process of passing an aerosol mixture through a filter. The asol mixture solely contains about 70 to 76% isostearic acid, about 6 to 7% isopalmatic acid, about 7 to 11% myristic acid, and about 4 to 5% palmitic acid.

Abstract: A surface contaminated with toxic materials to be tested or monitored is pled using a probe which is shown here to have a rectangular opening typically of several square inches in cross section. A pliable gasket of suitable heat-resistant material is used to cushion and seal the probe in contact with the surface, but small holes are provided of sufficient size (and positioned close to the surface to be tested) to allow ambient air to be drawn at a desired volumetric flow rate through a sampling tube which also forms the handle of the probe, and is connected through a flexible tube or hose to a suitable detector and vacuum pump. The detector and pump can be combined in a single unit. The detector can be one of several kinds of providing sensitive monitoring of agent vapors or simulant vapors, e.g., a flame photometer or a gas chromatograph (with suitable sampling techniques). Within the probe is mounted a lamp that provides intense heat (e.g.