M i c r o- Kjeldahl DIGESTOR
MANUFACTURERS' LITERATURE
with rheostat
individual control
The Labconco Micro-Kjeldahl Digestor is small, compact and superbly constructed to give you years of troublefree service. Its six individual electric heaters are each equipped with an individual rheostat control. You get the exact heat you want every time. Available with or without glass manifold. Single heat models also available. Write for complete details and prices.
LABORATORY CONSTRUCTION CO. 8811 Prospect Kansas City 32, Mo. Circle No. 49 on Readers' Service Card
N A T I O N A L
CO2 CO2 CO2 CO2 CO2 NA
INCUBATION . . . for efficient, modern s t u d y of b a c t e r i a , v i r u s , tissue c u l t u r e s by C 0 2 t e c h n i q u e . National Appliance has designed six COincubators for use in hospitals, pathology clinics, veterinarian schools and laboratories, research laboratories, public health laboratories, as well as plant and animal sciences. Incubators now manufactured by National represent the three methods of obtaining C 0 2 atmospheres: batch displacement, vacuum and continuous flow. National's CO; incubators arc designed for critical control of temperature. C O Ï tension and moisture content with flexibility of variations. They are designed for use as wet or dry chambers with a line of waterjacketed incubators providing for ultimate temperature control. There is a National CO: incubator ideally suited to your purpose.
FREE:
National Appliance Co. 7 6 3 4 S.W. Capitol Hy. · Portland 1 9, Ore. fasfern Safes: H. Reeve Angel & Co., Inc. 9 Bridewell PI. · Clifton, N. J .
Send now for a free copy of Bulletin No. 6051, "Carbon Dioxide Incubation." In it yon will find a complete description of applications, methods and advantages in the use of CO; incubation. In it, also, is catalogued National's complete line of CO: incubators and accessories, including price lists.
N A T I O N A L Circle No. 55 on Readers' Service Card
160 A
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A P P L I A N C E
ANALYTICAL CHEMISTRY
A P P L I A N C E
R a d i o i s o t o p e Handbook. Booklet of 64 pages gives variety of general and technical information on radioisotopes. T h e main section headings are fundamentals and definitions, radiation, nuclear fission and nuclear reactors, radioisotope production, radiation shielding, uses of radioisotopes, and cobalt-60 information. Also has four appendices. (The AECL Radioisotope Handbook) Requests for copies should be sent on company letterhead directly to Atomic Energy of Canada. Ltd., P.O. Box 93, Ottawa, Canada. Amino Acid A n a l y z e r . Brochure gives information on the Model 120 unit in some of its applications. Describes operating principle, and shows specifications and reproductions of actual analysis curves. Beckman Spinco Division (Brochure S-158). L-l pH Meters. Single-sheet bulletin describes the Model N - l portable p H m e t e r for plant and laboratory use and the Model N - 2 for field use. T h e latter has all necessary supplies and equipment in a fitted cover. Beckman Scientific and Process I n s t r u m e n t s Division (Bull. 720-C). L-2 Ultramicrotomy. Technical specifications, data, and accessories arc shown in 20-page illustrated brochure on t h e L K B U l t r a t o m e ultramicrotome. Electron micrographs of 40 serial sections are shown. L K B I n s t r u m e n t s , Inc. (The Ultratome for Modern Ultramicrotomy). L-3 Research Biochemicals. Latest issue of company's catalog lists more t h a n 3000 biochemicals: enzyme substrates, amino acids, peptides, carbohydrates, alkaloids, proteins, fatty acids, and others. M a n n Research Laboratories, Inc. (Reference Guide and Price List No. 120). L-4 Chromatography Reagents. Prices on 11 Spray tec aerosol reagents for p a p e r c h r o m a t o g r a p h y are listed on a single page. M a n n Research Laboratories, Inc. L-5 Recorders and Indicators. Illustrated 48-page catalog shows the 2- to 24point ElectroniK LTniversal multipoint recorder and other recorders and indicators. Basic measuring circuits are diagrammed. Minneapolis-Honeywell Regulator Co. (Cat. Clô-la). * L-6
