MANUFACTURERS' LITERATURE A connection is provided for a recorder. The gage utilizes a sealed radium source. The source emits alpha par ticles to produce ionized gas molecules which are collected on a plate and pro duce a current for indicating the meas ured pressure. The gage cannot be damaged by exposure to atmospheric pressure, according to the company, because the ion source operates at room temperatures and at zero potential. 22
joints, adapters, high vacuum stop cocks, and flanges distributed by Roch ester Scientific Co. {Quickfit). 25 Pumps. Folder of 3 pages describes construction and operation of laboratory pump that forces liquids, solutions, or gases through rubber tubing without corrosion or contamination in pump. Schaar & Co. (Sigmamotor Pump). 26 Power Demand Meters. Two-page sheet describes printing power demand meters for use in combination with wattmeters or totalizing devices to pro vide printed record of power demands. Streeter-Amet Co. 27
MANUFACTURERS' LITERATURE
Thermistor Thermometers. Sheet of 2 pages gives information about port able, remote reading thermistor ther mometer available with ranges covering - 2 3 ° to 100° C. for laboratory and field research. The Yellow Springs Instrument Co., Inc. {Tele-Thermom eter). 28
API Standard Samples. Two lists to taling 18 pages give information con cerning 25 organic sulfur compounds and 226 hydrocarbons available as American Petroleum Institute standard samples. Carnegie Institute of Technology. 23 Glassware. Catalog of 16 pages gives data on glass tubing and rod, capillary tubes, low pressure gage glass tubes, glass cylinders, glass wool fiber, and other scientific glassware items. Friedrich and Dimmock, Inc. 24 Ground Joints and Stopcocks. Bul letin of 8 pages lists sizes and prices of conical and spherical ground glass
Microhardness Testers. Brochure of 48 pages discusses theory and practice of microhardness testing with Reichert tester. William J. Hacker & Co., Inc. 29 Stress Measurement. Five-page re print of paper describing theory, con
HOW MUCH DO YOU KNOW ABOUT SONICS?
Grignard Reagents. Bulletin of 4 pages lists available Grignard reagents and discusses uses and recommended han dling procedures. Arapahoe Special Products, Inc. 34 Analytical and Control Instruments. General catalog of 12 pages covers line of mass spectrometers, leak detectors, For further information, see coupon on page 47 A
DIFFUSION PUMPS AUTOMATIC TOEPLER PUMPS McLEOD GAUGES—with or without Ground Capillaries MELTING POINT APPARATUS ALL TYPES OF GRADUATED GLASSWARE
MASSACHUSETTS
DISTRICT OFFICES: Boston, New York, Cleveland, Chicago, New Orleans Los Angeles (Wilmington), San Francisco, Seattle. I N T E R N A T I O N A L DIVISION: 19 RECTOR ST. NEW YORK CITY
SPECIAL APPARATUS 762
ECK SONIC OSCILLATORS Circle No. 57A-1 on Readers' Service Card, page 47 A
V O L U M E 2 6, NO. 1 1 , N O V E M B E R
Organic Chemicals. Price list of 16 pages covers biochemicals, amino acids, pharmaceuticals, and other special chemicals available from WinthropStearns, Inc. 33
HIGH VACUUM STOPCOCKS—Pre cision Ground Our Specialty
RAYTHEON MANUFACTURING COMPANY 54,
Chromatography Equipment. A 24page catalog describes equipment, ap paratus, and supplies, including sol vents and adsorbents, for chromato graphic work. Will Corp. 32
One of the many new items in new List
Write for detailed bulletins and literature on recent applications in research. Address Dept. 61W-AC.
SALES DIVISION, WALTHAM
Balances. Advantages and specifica tions of 1-pan, constant sensitivity balance with capacity of 200 grams and sensitivity of 0.1 mg. presented in 4page folder. Wm. Ainsworth & Sons, Inc. (Right-A-Weigh). 31
762 JACKETED BURETTE
"We don't want anyone to know more than we do about sonics in industrial research. We use a Raytheon Sonic Oscillator to investigate potential applications." Industrial laboratories find Raytheon Sonic Oscillators pro vide a quick and complete answer to questions about the effects of sonic vibration in chemical and industrial proc esses. Compact, easy to use, highly efficient, they are practical research tools that no well-equipped laboratory should be without.
EQUIPMENT
struction, and advantages of new in strument for measuring stress in electrodeposits. Joseph B. Kushner Electoplating School. 30
1954
& KREBS, I N C .
27-09—40»h AVENUE LONG ISLAND CITY 1, Ν. Υ. Manufacturers of Scientific Glass Apparatus and Instruments Circle No. 57 A-2 on Readers' Service Card, page 47 A
57 A
