Expedite yout FREEZE-DRYING Ptoceétes! N o matter the extent of the freezedrying operations in your laboratory, you're certain to find T H E apparatus most suited for your procedures in Machlett's wide and diverse line. Rang ing from a 4 0 0 ml capacity all-glass unit to an 8 liter capacity stainless steel super unit with conveniently staggered drying ports, all of these apparatus are self-contained and d o not require the conventional dry ice chamber o r con denser. However trap can be used for added safety. While all of the stainless steel ap paratus can be autoclaved as a unit after use with infectious materials, the macro and super drying units hold enough dry ice and solvent for unattended over night operation. Their large inner cooling chambers also lend themselves readily to shell freezing.
VIRUS STAINLESS STEEL PORTABLE UNIT Cat. No. E36-693-3. This convenient assembly illustrated above is compactly mounted on a sturdy stainless steel cart with free rolling casters. It consists of the macro unit and super trap (both described below), McLeod Gauge without mercury and a heavy duty, V3 h.p., 115 volt A C "DuoSeal" pump $645.00 Available also with Super drying unit at $120.00 additional cost.
VIRTIS STAINLESS STEEL MICRO UNIT Cat. No. E36-693-1. This self-contained unit is equipped with 6 ports and has a 150 ml drying capacity and 800 ml solvent chamber $65.00
VIRTIS MACRO STAINLESS STEEL UNIT Cal. No. Ε36-693. Fitted with 12 drying ports, apparatus has 1.2 liter drying capacity, 2.8 liter solvent chamber $130.00
VIRTIS STAINLESS STEEL SUPER UNIT Cat. No. Ε36-693-2. Super drying unit is fitted with 18 ports and has an 8 liter drying capacity and 8 liter solvent chamber .$250.00 E36-693-A Stainless Steel Trap for macro and micro units. .
$35.00 E36-693-4 Stainless Steel Super Trap for super unit. .$75.00 E36-693K McLeod Gauge 5.0 mm to 0.005 mm Range (without mercury) 43.00 E41-480 McLeod Gauge (without mercury) 99.00 S p e c i a l l y d e s i g n e d f r e e z e - d r y i n g flask for V i r t i s Apparatus. W i d e mouth facilitates removal o f d r i e d material. E36-693B 25 ml . . . $8.00 E36-693C 50 m l . . . 8.60 E 3 6 - 6 9 3 D 1 0 0 m l . . 8.80
E36-693E 250 ml $12.50 E36-693F 500 ml 14.00 E36-693G adapters for flasks 2.50 36-693V bleed valve adapter for breaking vacuum on individual flasks without disturbing rest of unit 4.50 Tear drying bulbs 1 ml per dz. $3.60, per gross $36.00 Tear drying bulbs 5 ml per dz. $5.20, per gross $52.00
ALL-GLASS MODIFIED CAMPBELL-PRESSMAN FREEZE-DRYING UNIT Cat. No. E36-695H. With four conveniently located drying ports around its lower periphery, ap paratus stands only 21 inches high. Complete with support stand, adapters, four flasks—100, 200 or 250 ml capacity (please specify) $68.00 E36-695A. Freeze-Drying Unit only 46.00 E36-695B. Flasks 100, 200 or 250 ml capacity 3.00 E36-695D. Flask 1,000 ml 3.45
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NEWS ASTM Atlantic City Meeting T h e 58th annual meeting of t h e American Society for Testing Materials, to be held a t Atlantic City, N . J., J u n e 27 to J u l y 1, will include 32 technical sessions a n d about 50 meetings of committees and subcommittees. T h e annual M a r b u r g Lecture, established to honor t h e first secretary of t h e society, will be given J u n e 29 by Walter J. Hamburger, Fabric Research Labora tories, Boston, Mass., who will speak on " A Technology for t h e Analysis, Design, a n d Use of Textile Structures as Engineering Materials." T h e Gillett Memorial Lecture will be given by Fritz V. Lenel, Rensselaer Polytechnic Institute, Troy, Ν . Υ., on J u n e 28 on t h e subject of "Powder Metallurgy, New Techniques, Improved Properties, Wider U s e . " T h e meeting will include seven sym posia on impact testing, j u d g m e n t of factors in soil testing, high p u r i t y water corrosion, atmospheric corrosion of nonferrous metals, speed of testing, and metallic materials for service above 1600° F . Individual papers will cover soils, nonferrous metals, steel, tests of concrete, fatigue, and effect of t e m perature. A panel discussion on pyrometric practice in elevated temperature testing will be sponsored b y t h e Joint A S T M - A S M E Committee on Effect of T e m p e r a t u r e on t h e Properties of Metals.
Techniques of Electron Microscope T h e Summer Laboratory Course in Techniques a n d Applications of t h e Elec tron Microscope will b e given again b y t h e L a b o r a t o r y of Electron Microscopy, Cornell University, from J u n e 13 t o 25. T h e course is designed t o give an in tensive survey of basic theory and interpretation of results. Inquiries should be addressed t o Benjamin M . Siegel, D e p a r t m e n t of Engineering P h y s ics, Rockefeller Hall, Cornell Uni versity, Ithaca, Ν . Υ .
ANALYST'S CALENDAR American Chemical Society. 128th Meet ing, Minneapolis, Minn., September 11 to 16. Third Annual Conference on Mass Spec trometry. ASTM Committee E-14, Mark Hopkins Hotel, San Francisco, May 23 to 27. Sixth Symposium on Microscopy. Ar mour Research Foundation, Sheraton Hotel, Chicago, 111., June 16 to 18. Eighth Annual Analytical Symposium. Syracuse University, Syracuse, Ν. Υ , June 17 and 18. Summer Session in Statistics. University of Florida, Gainesville, Fla., June 20 to July 29.
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