INSTRUMENTS FOR POLLUTION CONTROL
MANUFACTURERS' LITERATURE
Now-Record Wind Velocity in Any of Three Units The Gurley Universal Anemometer reads wind velocity—important factor in controlling air contamination—in kilometers per hour; miles per hour; or knots. The three units can be used interchangeably. A simple switch over a calibrator changes the instrument's method of recording from one speed unit to another. The indicator pointer instantly adjusts to the correct reading for the unit selected. The Gurley DC Anemometer is wind-powered... requires no outside power to indicate and record velocity. Accurate within 2% at velocities from about 2 to 100 miles per hour, it is frequently used to control other equipment. Gurley Anemometers are in wide use at municipal and industrial pollution control laboratories, airports, weather stations, oil refineries, in homes and at shore installations. Other Gurley Wind Instruments for pollution control stations include : Wind Direction Instruments, Wind Velocity and Direction Recorders and Pilot Balloon Theodolites. Write for Bulletin 6000.
Current Meters, Water Level Recorders Reveal Water Conditions The study of flow and level of water are two basic steps in controlling pollution of streams and other waters. The basic flow measuring instrument is the Gurley Current Meter, in use in federal, state and municipal bureaus for 70 years. Gurley Current Meters are available in a variety of outfits for use by overheadcable suspension... wading-rod suspension... exploration and survey parties. Gurley's "Price Pattern" instruments can be supplied in either fresh or salt water models. There is also the "Pygmy" for shallow streams, flumes and canals. Gurley Water Level Recorders make continuous graphic records for an entire day or week. Floatoperated, simple in construction and operation, they are widely used in reservoirs, sewers, sewage disposal and hydro-electric plants, and supplement irrigation and stream gaging measurements. For details on these and many other Gurley Hydraulic Engineering Instruments, write for Bulletin 700. Other Gurley Instruments to aid you in pollution studies include: Densometers for measuring porosity, air-permeability and air resistance of samples; Permeometers for measuring air flow through samples. Write for further information.
W. & L. E. GURLEY, 523 Fulton Street, Troy, New York Instrument Makers Since 1845 numbers 70A-1, 70 A-2, 70A-3 on Readers' Service Card, page 59 A
Multiplier Fluorescence Meter. Three-page bulletin describes new fluorescence meter and accessories. Includes price lists. Photovolt Corp (Bull. I 31 Monochromators. Bulletin of 10 pages discusses advantages, construction, operation, specifications, and gives price information for Leiss Mirror-Monochromators. Photovolt Corp. (Bull. 980). 32 Constant Bath Components. Sixteenpage catalog presents company line of components required in constant temperature bath assemblies. Emil Greiner Co. 33 Testing Instruments. Ninety-two page catalog describes instruments for testing paint, paper, rubber, plastics, ceramics, oil, leather, food, and other materials for production, plant, and laboratory use. Includes price information. Gardner Laboratory Inc. 34 Dryers. Three bulletins describe models of self-contained pilot plant or laboratory size rotary dryers which require only fuel and electrical connections to be operable, and which are easily movable. Hardinge Co., Inc. (Bulletins AH-4-71,472,473). 35 Oxygen Combustion Bombs. Sixteen-page bulletin describes seven different bombs for calorimetry and oxygen combustion tests giving detailed specifications and applications. Parr Instrument Co., Inc. (Spec. 1100). 36 Filter Paper. Four-page brochure lists industrial nitration products and specific grades of filter paper most commonly used. Includes specifications for line of filter papers. Eaton-Dikeman Co. 37 High Temperature Bath. Two-page bulletin describes applications and features of new high temperature bath fitted for either water or oil media. Precision Scientific Co. (Bull 668). 38 Spectrophotometer Survey. Fourpage analysis form enables estimation of spectrophotometer work loads for indication of potential usefulness of automation. Beckman Instruments, Inc. (Bull. 469). 39 Sequestrene. Twenty-page bibliography includes abstracts of over 350 For further information, see coupon on page 59 A ANALYTICAL
CHEMISTRY
