35 A
V O L U M E 2 2 , N O . 2, F E B R U A R Y 1 9 5 0
Carbon and Sulfur Determination. A high frequency combustion unit is described for igniting samples in the determination of carbon and sulfur in iron and steel analysis. Catalog Section B-4912. Boder Scientific Co. 7
...
STABILIZED and REGULATED
Micromanipulator. Illustrated bulletin T 114 describes micromanipulator and microforge for use in exact microbiological and microphviicnl studies. With a single control lever, microneedles, .;c~alpels,and othei micro equipment may be manipulated in all planes. The microforge is used for making instiuments from , 2 glass, metal, or other fusible materials. A. S. Aloe Co.
..
Water Hardness Test. Technical data sheets explain ne\\simple hardness test for water, which is claimed to be more accurate than soap method and considerably more rapid. \Y.H . L. D. Betz. 3
...
Platinum Crucibles and Dishes. %page illustrated brochure of notes on the care and use of platinum crucibles and dishes. J. Bishop &- Co. Platinum Works. 4
...
Laboratory Apparatus. First issue of ne\T bimonthly publi(nation called Lanco Apparatus S e w s . Describes and illustrates v:trious items of laboratory apparatus and equipment. Arthur S. T,.L Pine and Co. 5
...
Viscosity Control. Data sheet 012 describes the Viscotrol, instrument unit which can be engineered into production systems to provide continuous and automatic viscosity control. 13ronlifield Engineering Laboratories, I n c . 6
:HI
...
Dialkyl Cyanamides.
Physical and chemical properties, typiral reactions, and suggested applications are given for diallyl, dimethyl, diethyl, and diisopropyl cyanamide. American 7 ('ranamid Co.
...
Chromium Compounds. Reprint, Serial S o 56, gives properties of technically important hexavalent chromium compounds. llutuai Chemical Co. of .\merica.
...e
Temperature Indicators. Cold rnd compensated thermocouple thermometers for measuring temperatures up to 3000 ' E'. and resistance thermometers for temperatures up to 300 O F. are described and illustrated in technical bulletin. General Electric Co. (GEC-565). 9
...
Circle desired items and ma81 to ANALYTICAL CHEMISTRY, 332 West 4Pnd Street, New York 18, N. Y . New Products
1 2 3 4 5 6 7 8 9 1 0 1 1 Industrial Literature
1
2
3
4 ' 5
6
Name
7
8
9
The VARICELL, a product of The Superior Electric Company, meets today's demand for a stabilized and regulated source of variable D-C voltage. It operates from a 95-135 volt, 60 cycle, 1 phase ALTERNATING CURRENT line; delivers a DIRECT CURRENT output settable to any value from 0-30 volts. Maximum output current at any voltage setting is 15 amperes. The D-C output is stabilized - held t o the set value regardless of line variations. Output is also regulated - the unit automatically compensates for load fluctuations. Stabilization and regulation: 0.25% for an output setting between 6 and 30 volts. R.M.S. ripple voltage does not exceed t 0.1 volts. Only the VARICELL offers stabilized and regulated variable D-C voltage from A-C lines. One unit - built to give long, trouble-free service - gives you the flexibility of several. There are no extras to buy - no accessories or special parts are needed. One unit gives you completely variable D-C voltage - from 0 to 30 volts. WRITE TODAY FOR COMPLETE INFORMATION
Position
Company Street City
Zone-State (Please print
or type)
e3
802 MEADOW STREET, BRISTOL, CONNECTICUT
Feb. '50
I I I I I I
POWERSTAT VARIABLE TRAhSFOAMERS V O J B O X A-C POWEP SLPPJES
SlABlllhE VOLTAGE REGULATORS
