• • • • • • • • • • • •
Distillation Evaporation Extraction Fractional Distillation Freezing Point App. Grignard Preparations Melting Point App. Reflux Apparatus Separation Steam Distillation Vacuum Distillation Vacuum Filtration
MANUFACTURERS' LITERATURE m i n u t e currents over t h e contacts of regulating devices. Precision Scientific Co. (Datasheet 1149S). 21 Petroleum Testing A p p a r a t u s . Cat alog of 48 pages covers English-made petroleum testing apparatus—including flash testers, gum a p p a r a t u s , and grease testing apparatus—distributed b y L a b line, Inc. (Labline-Seta Cat.). 22
Combustible
"QUICKFIT" SEMI-MICRO ORGANIC PREPARATION APPARATUS
A Complete Organic Lab in Miniature Over 60 "Quickflt" interchangeable components incorporating "Quickfit" ground glass joints are mounted on both sides of a stand 2 8 " long by 8" wide by 16" high, weighing only 14 pounds. All common organic techniques as listed above can be performed and the complete apparatus is easily portable. The various condensers are connected in series, the water inlet and outlet tor the entire unit being located at the foot of the end panel. #11955 "Quickflt" Semi-Micro Organic Set, complete with glassware, stand, and 3 standard taper thermometers — 1 0 to 1 10°C, 0-250°C, 0-360°C $156.00
ROCHESTER SCIENTIFIC
Gas
Analyzers.
Twenty-page brochure describes con tinuous, explosionproof combustible gas analyzers a n d t h e design of combustible gas a l a r m systems. M i n e Safety Appli ances Co. (Bull. 0703-3). 23 Vacuum Measurement. Pamphlet of 24 pages briefly discusses various m e t h o d s a n d instruments for measuring v a c u u m . George E . Fredericks Co. 2 4
Light Hydrocarbon Gas Analysis. Twelve-page reprint of paper on t h e application of infrared m e t h o d s t o light hydrocarbon gas analyses gives outline of procedure a n d calculations for typical five-component analysis. T h e PerkinElmer Corp. 25
COMPANY
38 SCIO STREET
·
ROCHESTER 1 , NEW Y O R K
For further information, circle number 54 A-1 on Readers' Service Card, page 43 A
RLP
Laboratory Tubing
V i s c o m e t e r . Brochure of 8 pages de scribes operation of Swiss-made tor sional viscometer for laboratory use and process control, and discusses its appli cations. Drage Products, Inc. 27
Does More Jobs BETTER Because: IT IS 9 5 %
PURE LATEX
Safe and non toxic. May be used for food, bacteriolog ical and medical testing purposes. Resistant to most chemicals. May be repeatedly sterilized.
IT IS S T R O N G A N D
TOUGH
Tested to 4500 lbs. per square inch. Withstands rough usage.
IT IS M O S T ELASTIC
World Suppliers
Withstands stretching and usual pressures without losing shape. T h e most elastic type of tubing made.
IT IS M O S T RESILIENT Soft, pliant, light weight, easy to connect and disconnect. Safe to use on the most delicate lab equip ment. Available in 24 sizes from 1/8" χ 1/32" through 1" χ 1/8". Order from your laboratory supplier.
Rubber Latex Products, Inc., Cuyahoga Falls, Ohio For further information, circle number 54 A-2 on Readers' Service Card, page 43 A
54 A
S p e c t r o g r a p h s . Eight-page catalog describes E b e r t plane grating spectro graph with order sorter said to be a d a p t e d to all spectra from simplest to most complex. Jarrell-Ash Co. (Cat. EB-10-5L). 26
Color Difference Meter. Six-page folder describes tristimulus colorimeter for fast, automatic color difference measurements in laboratory or produc tion applications. Gardner Labora tory, Inc. (Bull. 156). 28 B a l a n c e . Two-page sheet describes electrical microgram balance for meas urement and automatic registration of small changes in weight or m o m e n t u m . C. A. B r i n k m a n n & Co. (Elrnic Bal ance). 29 Electronic Equipment. Catalog of 192 pages covers electronic equipment a n d accessories, tubes, test instruments, capacitors, transformers, books, etc. N e w a r k Electric Co. (Cat. 58). 30 T h e r m o c o u p l e E l e m e n t s . Four-page folder lists prices and application d a t a for line of thermocouple elements and bare thermocouple wire. Claud S. Gordon Co. (Form U-15-54). 31 For further information, see coupon on page 43 A ANALYTICAL
CHEMISTRY
