oven, and constant temperature bath. Sixteen pages. Will Corp. {Lab Log No. 4). 26 Frequency Measurements. Measurement of low to UHF frequencies, rotational velocity, flow, pressure, temperature, and strain are covered in this 17-page booklet. Telemetry and setting up a secondary standard of frequency are also covered. Charts and diagrams. Beckman/Berkeley Division {Data- File 111). " 27 Sodium Dispersions. Preparation and use of sodium dispersions are described in this revised 42-page booklet. Various sections deal with availability, formulations, preparation, equipment and procedures, and applications. Tables, illustrations, and bibliography. U. S. Industrial Chemicals Co. 28 Electronic Fluoroscopy. Use of electronic fluoroscopy in metal examinations is described in six-page reprint from March-April issue, of Non-Destructive Testing. Handling of thick steel and aluminum sections, and automation possibilities are discussed. Philips Electronics, Inc. 29 Balance Weights. List of new NBS laboratory weight classifications and the tolerances in each class are given. Description and prices are then given for company's line in each classification. Six pages. Will Corp. (.Vc. Z). 30 Laboratory Equipment. Variety of equipment is described. Includes such items as a cylindrical slide rule, Teflon stopcocks, new polyethylene equipment, and Beckman instruments and accessories. Sixteen pages. Scientific Glass Apparatus Co. 31 Clinical Apparatus. This 42-page catalog shows centrifuges, chromatography and electrophoresis equipment, and other specialized and general items for biochemical, clinical, medical, and pharmaceutical laboratories. Fisher Scientific Co. {Bull. No. FS-265). 3 2
The fust and reliable analytical procedures* using
COMPLEXONES6 ha ve established themselves thoroughly in analytical chemistry.
T h e y have
revolutionized t h e field of water h a r d ness determination. For more information on methods and availability t h r o u g h
licensed
manu-
facturers a n d dealers write to
UETIKON CHEMICAL COMPANY UETIKON (SWITZERLAND) ® Trade Mark Reg. U. S. Patent Office * U. S. Patents 2,583,890 & 2,583,891
For further information, circle number 111 A-1 on Readers' Service Card, page 99 A
depery|sÎ0le NALGON ...flexible plastic tubing NALGON TUBING* is saving time and money in plants and laboratories everywhere. Perfect flexibility, high chemical resistance, absolute safety, true transparency and excellent dimensional stability prove efficiency in use . . . and it's economical too! The Vi" n> with %e" wall sells for less than 15c per foot. You'll find NALGON easy to handle and available in all s i z e s f r o m Ys" ID t h r o u g h 2" Π). Ask your dealer for catalog E-9S6
Transistor Amplifier. Brochure of four pages describes an all-transistor amplifier, with the aid of block diagrams and illustrations. Specifications and typical applications are included. Beckman Instruments. Inc. {Bull. No. 8008). 3 3 Variable Transformer. Technical rat ing data, illustrations, and diagrams are given for the Powerstat variable For further information, see coupon on page 99 A
* A ^ \ \ W % PRODUCT
the NALGE CO. Inc. R O C H E S T E R
2 .
N E W
Y O R K
World's largest producer of Plastic Laboratory Ware For farther information, circle number 111 A-2 on Readers' Service Card, page 99 A VOL. 2 9 , N O . 9 , SEPTEMBER 1 9 5 7
·
111
A
