46A
ANALYTICAL
CHEMISTRY
NEW PRODUCTS, continued problem control system. Patching and operating of problems is the same as in Reeves' larger computers. 16
operation and an internal computing reference source. Problems are set up on patch boards which plug into the front of the computer, so that one in strument can be used for several prob lems with minimum set-up time. Exter nal equipment can be wired into prob lems through binding posts and con nectors, permitting a desk-top computer to be interconnected with other com puters of any size. Model C301 has all components wired directly to the patch bay for flexibility. Problem control is obtained by patching computing elements through switches and relays. Model C302 has an integrated internal
Electrophoresis Unit
A paper electrophoresis unit for separation, identification, and quantita tive determination of such complex systems as mixtures of amino acids, lipides, steroids, carbohydrates, and pro teins has been designed by Microchemical Specialties Co. The equipment per mits up to 10 analyses to be made simultaneously. Buffer cells and tray for supporting filter paper are made of clear plastic.
Trays of differing length can be used when different lengths of paper are re quired. One stainless steel and one carbon rod are used as electrodes in the buffer cells. 17 Centrifuge
A laboratory centrifuge called the Westfalia LWA-205 is being distributed in the United States by Merco Centrifu gal Co. The machine is equipped with four interchangeable bowls to provide concentration, liquid clarification, sol vent extraction, and centrifugal mixing. Bowls can be fitted quickly onto the same base.
The centrifuge has a capacity of 0.2 to 2 gallons per minute and operates on 110, 220, or 440 volts. Centrifugal speeds up to 12,000 r.p.m. and centrifu gal forces of 7500 gravities or more are attained. The unit weighs less than 150 pounds and measures 30 inches high. Internal parts are of stainless steel. 1 8 Marking Pen
N O W — Y O U CAN BE SURE! 8*11
ΰ
TYGON
TUBING
Don't accept "just as goods". Insist on the finest laboratory tubing made. Specify T Y G O N . Be sure you get T Y G O N . Look for the T Y G O N name and formulation number permanently branded on every foot of tubing you buy.
Microscope Camera
ψ
AT YOUR LABORATORY
SUPPLY
THE UNITED STATES STONEWARE COMPANY
AKRON 9. OHIO
Tech-Pen is a laboratory marking pen, marketed by Mark-Tex Corp., that will write on glass, metal, wood, porcelain, and other porous and nonporous sur faces with opaque, quick-drying ink. Markings are resistant to temperature changes and many chemicals. They can be removed by use of organic sol vents. Various colors of ink are supplied with the metal pens. 19
364-C
The Orthophot, an integrated reflex camera and controlled light source for use with any standard microscope, has been brought out by Silge & Kuhne. The camera unit can be swung back when the microscope is to be used visu ally. A photoelectric light meter facili tates proper exposure, and the reflex viewer and an integral focusing device are claimed to provide precise focusing. The base mount is an illuminator, which may be purchased separately for visual use. It provides finger-touch regulation of intensity, color temperaFor further infomation, see coupon on page 41 A
