tometer, and Bronwill's Warburg apparatus are among the items described. Chicago Apparatus Co. (Dec. 1960).
Quality performance in an Economy centrifuge
L-25
Chemist-Analyst. Nine contributed technical articles on analysis are presented. Part III of the series on use of chelatochrome indicators in precipitation titrations is also included, as well as the usual variety of lab suggestions. J. T. Baker Chemical Co. (Vol. 49, No. L 4)-26 CIC Newsletter. Four-page issue features description of data plotting attachment for use with the DU spectrophotometer. Also gives results of questionnaire on use of spectrographs and chromutographs, which was distributed at last year's Pittsburgh Conference on Applied Spectroscopy. Connecticut Instrument Corp. ( No. 10, Dec. I960). L-27 Instrumentation. The feature position is given to an article on the instrumentation course offered to Bucks County (Pa.) Technical School students. Six other illustrated articles are also included. Minneapolis-Honeywell Regulator Co. (Vol. 13, No. 4). L-28
Trouble-free operation, strength a n d efficiency a r e built-in The Adams Analytical Centrifuge, with a relatively high speed of 3400 rpm and efficient angle head, provides rapid centrifugation in a low priced unit that performs most routine procedures. Modern design and precision workmanship set the Adams Analytical Centrifuge apart from other economy machines. Compact (10" diameter) and light (11% lbs.), the unit is strongly built and has a chemical-resistant finish. Head accommodates six 5 ml. tubes. Motor operates on 110-115 volts, 60 cycles, AC, and oilite bearings require no lubrication for two years. Centrifuge complete with angle head, aluminum shields with cushions, and six 5 ml. glass tubes $69.00 CALL Y O U R SUPPLIER T O D A Y - O R WRITE DIRECT T O
Clay Adams
N E W YORK 10
Keithley Engineering Notes. Fourpage issue gives detailed description of the Model 515 self-contained line operated high megohm bridge; illustrations and diagrams are included. Keithley Instruments, Inc. ( Vol. 8, No. 5). L-29
Nesco
The Laboratory. Chemical and clinical research behind the toy industry is described in the illustrated feature. Other articles describe new developments in instrumentation, apparatus, and technique. Fisher Scientific Co. (Vol. 28, No. 5). L-30
- the utmost in flexibility - every w o r t h w h i l e feature only $ 7 9 5 0 0
Circle No. 31 on Readers' Service Card
POLAROGRAPHIC ANALYZER
Norelco Reporter. Featured in the issue are a 6 1 / 2 -page article on the function and application of counters and the pulse height analyzer, and an 8pagc article on the morphology of fats, oils, and shortenings. Both are extensively illustrated. Philips Electronic Instruments (Vol. VII, No. 6). L-31 S/P Bulletin. Coleman's flame photometer and Autoflow sample handling system, the Coulter Research Counter and automatic plotter, the Hycel semimicro PBI system, and the International Cryostat are among the items shown. Scientific Products (Dec. I960). L-32 Tablog. Tabloid-size newspaper type supplement to the company's Lablog gives illustrated descriptions, specifications, and prices for a large variety of instruments and apparatus. Will Corp. (Nov. 1960). L-33
Model RG-10 Current ranges: Polarizing ranges: Accuracy: Chart: Bridge drive: Damping & suppression: Standardization:
23, from .5 to 300 micro-amperes full scale. 10, from + I V 2 to —5 volts. Vz% current and voltage; repeatability: V4%Width: 5", speed: y2" per minute. Synchronous, rotation time: 10 minutes. Controls on panel. Manual, against internal cell.
Nesco
Send for complete data in Bulletin
INSTRUMENTS. INC
RG-10
Manufacturers of Precision Recording Instruments 638 WEST 17TH ST., COSTA MESA, CALIF./MIDWAY 6-1679 Circle No. 56 on Readers' Service Card
VOL. 33, NO. 2, FEBRUARY 1961
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