NEW PRODUCTS
ing elements said to reduce calibration drift from contamination to a minimum. Gage tubes are interchangeable. The gage is compensated against line voltage and ambient temperature change. It weighs about 1 pound and is 2 X 2 5 / 8 X 4 inches in size. 8 M o l e c u l a r Filter
A biochemical molecular filter developed by The Emil Greiner Co. has openings claimed to be small enough to separate large molecules from small ones. Greiner reports that the filter can be
used to separate hemoglobin molecules of blood from the smaller salt molecules present in the plasma. 9 Plastic Protective H o o d
A lightweight plastic headpiece furnishing protection from fumes, gases, bacteria, or any type of contaminated atmosphere is being fabricated by Snyder Mfg. Co., Inc. The hood is constructed of flexible polyvinyl chloride film, with a heavy-gage transparent plastic facepiece. An air tube of extruded vinyl is sealed
the finest Laboratory Sinks
Î
mad@ lode
into a double-channel section of the headpiece and may be connected to a filtered or compressed air source or attached to a filter canister. A drawstring at the neck controls the air supply and permits the hood to be adjusted to fit the wearer. 10 Liquid Cooler
A compact, portable liquid cooler with an operating range from 60° F. down to —20° F. has been introduced by Mayer Refrigerating Engineers, Inc. Temperature control is said to be within ±'/4°F. A built-in brine tank permits the unit to be used as a bath, as well as for recirculation of liquid to laboratory apparatus. Components of the cooler include: 3 /4-hp. Freon compressor, air-cooled condenser, 40- to 120-gallons-per-hour brine pump, 4-gallon brine tank, and indicating thermostat. Over-all size of the unit is 28 inches wide, 22 inches deep, and 34 inches high. 1Î Spectrograph
A direct reading spectrograph, the Spectro Analyzer, that can analyze up to 65 different elements in 2 minutes has been developed by Fisher Scientific Co. The unit is described as.a multimatrix, double-spectrum, all-electronic instrument and is custom assembled by Fisher to fit the user's analytical needs. It is designed for use as a primary instrument for laboratories that make repetitive analyses of large numbers of metal samples. BETTER IN
jrosiON •
STANCE fc^BETTER
IN
•HOCK •NCE
•BETTER IN
P£EARANCE See your l a b o r a t o r y Furni-. ture Dealer or w r i t e direct for a copy of Bulletin L-8.
This sink is solid chemical porcelain, as thoroughly corrosion-resistant as the porcelain crucibles and dishes the chemist uses . . the only sink made today which possesses practically universal chemical resistance. It is a beautiful sink. Trim in design, with smooth, rounded corners, inside and out. Its lustrous, blue-gray glaze is an integral part of the porcelain body — can never peel or flake off, and is as easy to clean as a china dish. It possesses superb heat-shock resistance — and will withstand any heat shock encountered in laboratory usage. Superior to stone, superior to porcelainized steel, superior to sanitary ware, "U. S." grayglazed chemical porcelain sinks are rapidly becoming the first choice of laboratories everywhere. 90ε
U. S. S T O N E W A R E AKRON 9 , O H I O
For further information, circle number 52 A on Readers' Service Card, page 47 A
52 A
The Spectro Analyzer has an electronicalty-controlled source, so that there is no need to adjust the spark gap for each element. Source parameters are selected automatically to match each matrix being analyzed. A dual-spectrum optical system permits the operator to use the first and second order spectra on both left and right of the grating. The instrument uses a 2.2-meter concave grating ruled to 30,000 lines per inch. Interchangeable pickup units can be For further information, see coupon on page 47 A ANALYTICAL
CHEMISTRY
