WET OR DRY YOU LOSE EITHER WAY If y o u r f i n i s h e d p r o d u c t is t o o d r y . . . if y o u r p u r c h a s e d raw m a t e rials are t o o w e t . . . y o u lose m o n e y . Fast, accurate m o i s t u r e deter minations protect profit dollars when you s e l l . . . insure dollar values w h e n y o u buy. For g r a i n s , t e x t i l e s , f o o d s , paper, w o o d , t o b a c c o , coal, c e r a m ics, and m a n y o t h e r p r o d u c t s . . . y o u can get m o i s t u r e data a t least cost w i t h t h e
SCHLUMBERGER NMR Corn Argo, after NMR Test
Analyzer
Products Refining Company at Illinois, reports s u b s t a n t i a l savings using Model 104 S c h l u m b e r g e r Analyzer f o r m o r e t h a n t w o years. results were r e p r o d u c i b l e w i t h i n
±0.1%. This non-destructive analysis gives t h e answers in p e r m a n e n t record f o r m , in less t h a n a m i n u t e . It h a n d l e s l a r g e (40cc) s a m p l e s , enables an u n s k i l l e d o p e r a t o r to m a k e 2 5 0 m o i s t u r e tests in eight h o u r s . Answers are fast e n o u g h t o directly con trol drying processes... fast enough to inspect i n c o m i n g raw m a t e r i a l s before acceptance. With t h e NMR Analyzer, t h e f i n a l p r o d u c t is i m p r o v e d by t i g h t e r quality control. If your p r o f i t s are exposed t o " w a t e r d a m a g e , " y o u will f i n d it w o r t h w h i l e t o review a special file on the NMR Analyzer. This file covers e c o n o m i c j u s t i fication, technical data, actual material s t u d y reports, q u a l i t y c o n t r o l , produc t i o n , and inspection a p p l i c a t i o n s . It is available t o y o u at no cost and w i t h o u t o b l i g a t i o n . Write for it t o d a y on y o u r business l e t t e r h e a d . RIDGEFIELD INSTRUMENTATION DIVISION
SCHLUMBERGER WELL
S U R V E Y I N G
C O R P O R A T I O N
Ridgefield, Connecticut
Product Capsules Progress Board. Circle 116A-1 for 24-page illustrated booklet on the ''Boardmaster" visual control board that provides a graphic picture of operations as they progress day by day. Graphic Svstems, 55 W. 42nd St., Ν. Υ. 36, Ν. Υ. 116Α-1 Pumps. Circle 55A-1 for details on new mechanical 2-stage vacuum pump 10V 4 " high X I H / 4 " wide X 16V 2 " long. Capacity: 75 liters per minute. Circle 55A-2 for bulletin on the "CircO-Therm" oven. Temperatures to 250° C. Variations held within 1° C. Scientific Glass Apparatus Co., Inc., Bloomfield, N. J. 55A-1,2 Pumps. Bulletin available on vacuum pump that produces 75 liters per min ute. Vacuum to 0.1 micron. Pre cision Scientific Co., 3725 W. Cortland St., Chicago 47, 111. 65A Pumps. Data available on acid-proof "Siph-O-Pump" with squeeze bulb. Standard Scientific Supplv Corp., 80S Broadway, N. Y. 3, Ν. Υ. 67Α Radioisotopic Instruments. Bulletin provides a technical description of pro cedures used in radioisotopic yield determination. Circle 8A for copy. Nuclear-Chicago Corp., 251 W. Erie St., Chicago 10, 111. 8A Recorders. Ranges easily changed by convenient plug-in in portable (15 lbs) thermocouple recorder. Fahren heit or centigrade charts and scales are available for all ranges. Instrument Div., Varian Assoc, Palo Alto 4, Calif. 37A
Recorders. Bulletin available on vari able-response recorder for densitometry in paper electrophoresis. Sensitivity adjustable from 10 to 200 millivolts. Photovolt Corp., 95 Madison Ave., N. Y. 16, Ν, Υ. 74Α-3 Recorders. Bulletin available on the W-C dewpoint recorder that provides continuous, automatic monitoring of gas moisture content. Circle 113A-1. For bulletin on dewpoint indicator cir cle 113A-2. Weighing & Control Com ponents, Inc., 206-1 Lincoln Ave., Hatboro, Pa. 113A-1,2 Refractometers. Circle 66A for com plete data on the following Β & L re fractometers : Abbe-3L, high range Abbe-3L, precision, industrial, butyro, oil grading, hand, juice, and dipping. Bausch & Lomb Optical Co., 60935 St. Paul St., Rochester 2, Ν. Υ. 66Α Refrigerated Freeze-Mobile. Selfcontained, all purpose unit with in frared heaters, condenser, vacuum drum, pump and gauge, and mechan
Circle No. 108 A on Readers' Service Card, page 97 A 108 A
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ANALYTICAL CHEMISTRY
ically refrigerated unit. Automatically refrigerated as low as —60° C. Scien tific Products, Div. of American Hos pital Supply Corp., 1210 Leon PL, Evanston, 111. 39A Sample Changers. Circle 38A for catalog describing the new B-A sample changer that automatically programs, counts, and records 50 pre-coded sam ples. Baird-Atomic, Inc., 33 Univer sity Rd., Cambridge 38, Mass. 38A Shakers. Circle 95A-1 for bulletin on variable speed shaker for general pur pose agitation. Speeds between 60 and 260 oscillations per minute. Eberbach Corp., Box 63, Ann Arbor, Mich. 95A-1
Sinks. Circle 46A-2 for catalog on chemical porcelain sinks cast in onepiece construction without seams or joints. U. S. Stoneware, Akron 9, Ohio. 46A-2
Spectrometers. The "Atomcounter" direct reading spectrometer detects up to 30 metallic elements simultaneously and reads individual concentrations from dials within 2 minutes. JarrellAsh Co., 26 Farwell St., Newtonville 60, Mass. 53A Spectrophotometers. Circle 31A for descriptive literature on the model 21 infrared spectrophotometer and its ac cessories: dual long path cell, ultramicro KBr sampling system, slave re corder. Instrument Div., PerkinElmer Corp., 750 Main Ave., Norwalk, Conn. 31A Spectrophotometers. Bulletins pro vide new literature on the Coleman Junior spectrophotometer (Circle 50A-1), and the Universal spectropho tometer (Circle 50A-2). Coleman In struments, Inc., Dept. A, Mavwood, 111. 50A-1,2 Spectrophotometers. Circle 77A for data file providing details and com plete specifications on the Cary model 14 recording spectrophotometer. Range: 2.50-2.65 microns. Applied Physics Corp., 2724 S. Peck Rd., Mon rovia, Calif. 77A Spectroscopic Graphite. Circle 20A for new loose-leaf data filled catalog on spectroscopic graphite products. United Carbon Products Co., Box 269, Bay City, Mich. 20A Stirrers. Bulletin available on ex plosion proof, variable speed labora tory stirrers powered by air. Arrow Engineering Co., Inc., 200 Central Ave., Hillside, N. J. 112A-2 Stopcocks. Circle 70A for copy of new catalog including information on
