SURFACE GOES ALL THE WAY THRU
MANUFACTURERS' LITERATURE
Radioisotope Users' Catalog. Illus trated 36-page catalog describes a broad range of nuclear accessories and instru mentation for radioisotope users in re search, industry, medicine, and educa tion. Atomic Accessories, Inc. (Cat. C). L-1 Silicone Treated Papers. Four-page technical bulletin discusses three stand ard grades of Whatman filter paper in silicone treated form. The three grades are designed for medium, coarse, and fine retention. H. Reeve Angel & Co. {Tech. Bull. 1014). L-2
surface stains can be removed without harming or changing the surface
ALBERENE STONE —for 7 5 years t h e only permanently satisfactory material for chemical laboratory table tops, shelving, sinks, splash backs, drain boards and fume hoods. Prompt delivery.
For FREE literature a n d t e c h n i c a l assistance a d d r e s s : A L B E R E N E
STONE
(A DIVISION OF THE GEORGIA MARBLE COMPANY) 3 8 6 F O U R T H A V E . . N E W Y O R K 16, N . Y. D E P T . C Circle Ne. 16 an Readers' Service Card
A NEW
RINGING-INTERVAL PRECISION - TIMER *
Runs for 3 0 hours with o n e w i n d i n g
*
T i m e is set b y the center k n o b
*
S i d e levers e n e r g i z e alarm a n d start clock
T h e case is made o f d u r a b l e metal a n d is a t t r a c t i v e l y f i n i s h e d in b l a c k w r i n k l e d enamel w h i c h outlasts cases made o f plastics. Dial is 3 V a " in d i a m e t e r . Timer measures 4 3 / · ι " χ 4λ/ί" χ S ' A " and w e i g h s 2 0 ounces.
Cat. No, A46275...Timer,,,each
S ·
$77.25
STANDARD S C I E N T I F I C Supply Corp. 808 BROADWAY NEWYORK3 NY
Circle Να. 132 on Readers' Service Card
116 A
ANALYTICAL CHEMISTRY
Low-Cost Spectrophotometer. Illus trated mailing piece briefly describes the DB low-cost recording spectro photometer. Has business reply card which may be used for requesting addi tional information on various spectro photometers. Beckman Scientific and Process Instruments Division. L-4 Mass Spectrometer. Eight-page illus trated bulletin describes and gives de tailed specifications and applications of the company's Type 21-110 mass spec trometer. Consolidated Electrody namics Corp. (Bull. 21110). L-5 Gas Chromatograph. Six-page bro chure illustrates and gives detailed de scription of the company's Model 500 linear programmed high temperature gas chromatograph. Several chromatograms, as well as curves for the air oven, are included. F & M Scientific Corp. L-6
M a r k s a n y length of t i m e from Ά minute t o S hours with a 1 0 second b e l l signal
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Precision Balances. Illustrated cata log describes the company's line of bal ances and accessories, and gives sug gestions on their proper use. Also in cludes discussions on criteria of a good balance and on the history of balances. The Heusser Instrument Mfg. Co. (Cat. 57). 1-3
lAtOKATOBT APPARATUS MAOfNTS AND J CHEMICALS |
Fluids Contamination. Twelve-page manual describes test procedures for determining particulate contamination in hydrocarbons and hydraulic fluids with the aid of membrane filters and filter funnels. Gelman Instrument Co. (Manual le). L-7 Neutron Source. Four-page illus trated bulletin describes the low cost Model AN-400 Van de Graaff positive ion accelerator for neutron research, ac tivation analysis, and teaching of nu clear physics. High Voltage Engineer ing Corp. (Bull. AN-4). L-8
