NEW PRODUCTS
faster than hands.. and tireless
Adams Cyclo-Mixers For prolonged or rapid, controlled mixing in test tubes: Two-Unit or Four-Unit Cyclo-Mixers provide any degree of agitation - from rapid mixing to violent churning . . . eliminate time-consuming and fatiguing hand-mixing, need for monitoring, and danger of contamination. Three speeds with separate motor and speed control for each tube. Available with interchangeable cups to handle a variety of tube sizes ranging from 15 mm. to 25 mm. in diameter and up to 200 mm. in length. Use Single-Unit Cyclo-Mixers (not illustrated) for quick-as-a-wink mixing or agitation in test tubes or small flasks. Equipped with the unique Clay-Adams Foot Switch, the single-unit model leaves both hands free for holding tubes or flasks. Prices: Cyclo-Mixer, Two-Unit, each $154.00 Cyclo-Mixer, Four-Unit, each $248.00 Cyclo-Mixer, Single-Unit, with Foot Switch, each $68.50
Clay-Adams New York 10, Ν. Υ.
Available from your dealer.
Semimicro zone melting apparatus handles from 0.15 to about 10 grams at maximum temperatures of 2 1 0 ° , 2 5 6 ° , and 3 1 0 ° C. which are obtained with three interchangeable heating elements. The unit, which is portable, will accommodate 12-, 8-, or 5 - m m . o.d. Pyrex tubes and operates on 110 to 115 volt a.c. with power consump tion of 15 amp. at 1.5 volts. Tor sion Balance Co. 408
Circle No. 43 on Readers' Service Card
Carbon-Film
well-planned laboratories ® begin with S T E E L A B
A well-designed laboratory must fit your particular needs, give lifetime service, and be flexible enough to handle future changes. Let us show you how STEELAB furniture can fulfill all these require ments to your complete satisfaction.
LABORATORY
For i n f o r m a t i o n on fume hoods, chemical tables, sinks, service fix tures and table top materials, write for Catalog 585ST.
FURNITURE CO., INC.
OLD COUNTRY ROAD, MINEOLA, L. Ι., Ν . Υ. Over 50,000 Installations Since 1920 Circle No. 74 on Readers' Service Card 128 A
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ANALYTICAL CHEMISTRY
Potentiometers
Low-cost, mass-produced, carbonfilm potentiometers are available in two 10-turn models. Both models have infinite resolution, low noise, 0.5% linearity, and guaranteed life of 10 X 10° revolutions. Model 8711, r / s inch in diameter, features 1/200,000 resolu tion; Model 17511 features 1/400,000 resolution. Standard resistance values range from 5K to 500K ohms. Com puter Instruments Corp. 409
Electronic Potentiostats after Wenking are available in two models: the 61-TR standard unit and the 61-R fast rise model. They are used to in vestigate phase boundaries between an electrolyte and a metal. The po tential is constant or controlled in relation t o time. Brinkmann Instru ments, Inc. 410
