M A N U F A C T U R E R S ' LITERATURE Photomicrographic Camera Systems.
YOU HAVE SEEN THE REST . . . HERE'S THE BEST!
Accessories, formats, automatic expo sure control, illuminators, micro-flash, and filters for both automatic and man ual camera systems are described and illustrated in a new 12-page brochure. Carl Zeiss, Inc., 444 Fifth Ave., New York, Ν. Υ. 10018 417 Laboratory Recorder. Model BD5, featuring the application of a medium frequency field effect transistor chop per to obtain an input circuit which re sults in excellent zero stability with high sensitivity, is introduced in this 12-page booklet. Kipp & Zonen, P. 0 . Box 7, Delft, Holland 618 Precision Ceramic Products. Ceramic, metallic, and intermetallic products for the nuclear, electronic, aerospace, and associated industries are introduced in this eight-page brochure. Atomergic Chemetals Co., Division of GallardSehlesinger Chemical Mfg. Corp., 584 Mineola Ave., Carle Place, L. Ι., Ν. Υ. 11514 619
Β & L Atomic Absorption Spectrophotometer
• • • • •
Single Beam, Double Grating Spectrophotometer Unique Power Supply & Multiple Lamp Housing Remote Ignition System Choice of Readouts Designed for Easy and Convenient Operation
• Readily converted for Flame Emission or Absorption Write or phone for Model AC-2-20 Brochure
Ångstrom, Inc. P. O. Box 256, Belleville, Mich. 48111 Area Code 313-697-8058
Gas Chromatographs. Bulletin 7074, 20 pages, covers instrument features and specifications for Models GC-5, GC-4, and GC-2a. A section on instru ment modules, components, and acces sories is also included. Beckman In struments, Inc., 2500 Harbor Blvd., Fullerton, Calif. 92634 620
Top-Loading Balances. This new 18page catalog, No. M-1016, presents the company's line of top-loading balances which feature advanced suspension sys tems and improved taring and arrest ment systems. Mettler Instrument Corp., 20 Nassau St., Princeton, N. J. 08540 621
Nitrate Measurement in Soil. Bulle tin No. 6 describes a direct technique for determining nitrate in soil samples by using the Ionalyzer nitrate ion ac tivity electrode and portable specific ion meter. Orion Research Inc., 11 Blackstone St., Cambridge, Mass. 02139 622
Nonfragile
Permeable
Membrane.
Pellicon, a thin, homogeneous mem brane on a microporous substrate, is both thin enough for high flux rates at low pressures and thick enough for rou tine use. Data Sheet PM-1 presents a description of the material. Millipore Corp., Bedford, Mass. 01730 623
Circle No. 2E on Readers' Service Card
N E W . . . TRANSPARENT BETHLEHEM DRI-JAR 800-C . . . efficient
and
desiccator.
Ideal for
laboratory
inexpensive
use.
Now there are two types of Bethlehem DRI-JARS. The new 800-C, developed especially for handling up to six 0 size crucibles on two trays, is the time-saving way to cool and desiccate specimens. Its transparent glass container is 8%" high χ 4V2" in diameter with a screw top holding two 3%" diameter stainless steel trays. Each of these ad justable trays have three V/s" diameter holes to conveni ently hold the crucibles. And the 801-F DRI-JAR, with its container and top exactly like the 800-C, has four stainless steel adjustable trays for hold ing a number and variety of chemical, biological and metal lurgical specimens, electronic components and miniaturized parts. Standarize on Bethlehem 800-C and 801-F DRI-JARS . . . they're the easiest, most efficient and low-cost way to cool off and/or dry specimens and materials. Why not write, wire or phone for DRI-JAR details and prices now?
BETHLEHEM APPARATUS Bethlehem Apparatus Company, Inc. Hellertown, Pennsylvania Phone: Area Code 215 838-3691 Circle No. 34 on Readers' Service Card V O L 40, NO. 12, OCTOBER 1968
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