44A
ANALYTICAL
STAINLESS
CHEMISTRY
Balanced Paddle Stirrers
STEEL
Our new W A C O Balanced Paddle Stirrers are easily inserted in the'neck of the flask . . . never whip so your glass set-ups are safe!
Designed To Fit Your N e e d a n d Budget Double walled housing and door of polished stainless steel. Six sides insulated with 2" thick MODELLA in sulation. Heavy MODELLA resistance wire assures posi tive temperature uniformity throughout entire working chamber. Adjustable and removable stainless steel shelves. Underwriter's approved automatic control . . . response sensitivity ±Vz° C. Guaranteed for one year. Inside dimensions: 12" χ 12" χ 12" Temperature range: 37" C to 232° C $1 17.50 Current consumption: 7 amperes 110 Volts— COMPLETE 60 Cycles—A.C.
A l l made with 3 0 0 mm. χ 6 mm. shaft... the only difference is length of the paddle. Suitable for all popular sizes of flasks used in the laboratory. No. 7 2 9 8 - A C . W A C O Balanced Paddle Stirrers. Shaft 6 mm χ 300 mm. to Fit 1 / 4 " or 3 / 1 6 " chuck. In boxes of 3 Paddles Blade 2 0 χ 50 mm.—$2.00 Blade 2 0 χ 75 mm.—$2.25 Blade 2 0 χ 100 mm.—$2.35 No. 7 2 9 8 - A C . Conveniently packaged set of 3, $ x 0 0 one of each size Ο· — LABORATORY SUPPLIES AND CHEMICALS
CONTACT YOUR
L O C A L DEALER o r
WILKENS ANDERSON CO.
BLUE M ELECTRIC C O . 306-8
W . 69th
ST.
CHICAGO
2 1 , ILL.
4525 W. DIVISION ST.
·
CHICAGO 51
·
ILLINOIS
SPECTROPHOTOMETER Model IR-2 Ihis Beckman IR-2 Infrared Spectrophotometer is one instrument you will find indispensable in your research investigations, analytical laboratory determinations, or for t h e continuous, automatic control of many plant streams. Because it employs the "chopped" radiation principle— plus a n AC amplifier, t h e IR-2 eliminates zero drift and non-linearity . . . eliminates the effect of stray radiation
by use of a special filter-beam chopper . . . and eliminates reference conversion charts b y employing a directlycalibrated monochromator in wavelength units. A precision, direct-reading potentiometer assures high ac curacy measurements. (Calibrated to 0 . 1 % in transmittancy, it has a null meter for indicating unbalance.) These are but a few of the many IR-2 features. Write today for your copy of detailed Bulletin AC-153A.
SCIENTIFIC GLPSS
APPARATUS CO., INC. BL00MFIELD - NEW JERSEY
LABORATORY APPARATUS - INSTRUMENTS - CHEMICAIS - CtASSWARE
