determine DUST PARTICLE SIZE DISTRIBUTION below 60 microns
Micro-Particle Classifier No. 6000 with totally enclosed 220 volt, 3 phase motor operates at 3500 rpm. 16' high χ 16y2" diameter
with the DIETERT- DETROIT MICRO-PARTICLE CLASSIFIER Quickly determine sub-sieve particle sizes with scientific accuracy. The No. 6000 DietertDetroit Micro-Particle Classifier is widely used throughout industry for pre-testing dust col lector needs, for determining the separating efficiency of air cleaners, for particle size control in many industrial processes and for scientific studies of fine materials. Mineral flours, metal powders, abrasives, fly ash, chemicals, drugs, etc., can be classified into eight fractions below 60 microns, (materials above 60 microns can be retained for sieve analysis). An eight-fraction analysis can be completed at the rate of 15 minutes per fraction by unskilled operators. Fractions are precisely defined and may be retained for accurate study. Gentle sifting action prevents particle fracture—assures accuracy and reproducibility. 8-page catalog mailed on request
HARRY W. DIETERT CO. CONTROL EQUIPMENT 9330 Roselawn
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Detroit 4, Michigan
Send me 8 page Micro-Particle Classifier bulletinwithout obligation. NAME_
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COMPANY_ CITY
_STATE_
Circle No. 30 A-1 on Readers' Service Card, page 69 A 30 A
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committee of Sigma Xi. He was elected to the National Academy of Sciences in 1954. Wilfred B. Mann, chief of NBS's ^Radioactivity Section, received the ex ceptional service award for his work in the field of radionuclide standards and for accomplishments resulting in international leadership of NBS in this field. A native of England, Mann obtained his Ph.D. degree at the University of London in 1934, and his D.Sc. degree from the same institution in 1951. He is author of more than 30 publications in the field of radioactivity, and cur rently serves on several committees con cerned with radioactivity standardiza tion. John L. Hague, assistant chief of NBS's Analytical Chemistry Section, received the meritorious service award for outstanding original contributions to methods of analysis necessary for controlling production of complex metal alloj-s. Hague is a member of the American Society for Testing Materials, the American Chemical Society, the American Association for the Advance ment of Science, the Optical Society of America, and the Washington Academy of Sciences. Floyd A. Mauer, National Bureau of Standards, received the meritorious service award for valuable contributions to the field of crystal chemistry. He was cited in particular for his work in the application of special high tem perature x-ray diffraction techniques to the study of crystalline materials. Mauer is a member of the American Physical Society and the Washington Philosophical Society.
Arizona State Offers Spectroscopy Course The third annual course in modern industrial spectroscopy will be given by Arizona State College, August 18 to August 29. The special intensive course will include theory and appli cations with lectures and laboratory experiments divided into equal periods. Classes will be conducted by mem bers of the chemistry and physics de partments and industrial spectroscopists. Further details are available from Jacob Fuchs, co-director, Modern In dustrial Spectroscopy, Arizona State College, Tempe, Arizona.
Annual Exhibit and Symposium Held at NIH BETHESDA, MD.—ONCE AGAIN, the
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NEWS
ANALYTICAL
CHEMISTRY
annual Instrument Symposium and Research Instrument Exhibit held at
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LABORATORY SIZE CARTRIDGE DE-IONIZER GIVES toùwté'fiwL WATER
The ILLCO-WAY Throw-Away Cartridge De-Ionizer consists of a clear plastic column containing mixed-bed ionXchange resins. The mixed-bed ionXchange process will remove all dissolved solids (including, in our Research Model, silica and CO2) so that the effluent is pure enough for the finest analytical purposes. The Cartridge is used also to reduce the interfering ions often found in distilled water. The column is clamped in a bracket, as shown, with tubing and valves to connect to any tap or other water supply. ILLCO-WAY Resins used contain a color indicator which changes from purple to yellow as the resins become exhausted, showing when a fresh Cartridge is needed. RESEARCH MODEL Removes all ionizable solids including silica and CO2. Average in effluent less than 0.5 ppm. total solids. Capacity, 450 grains as CaCOs. Flow Rate, 5 gph. max. Price, $12.50 Bracket, extra, $7.50
UNIVERSAL MODEL Removes all ionizable solids, except silica and C02.Suitableforgeneral pure water needs. Capacity, 900 grains as CaCOa. Flow Rate, 5 gph max. Price, $9.75 Bracket, extra, $7.50
Order from your Laboratory Supply House or Write to . . .
ILLINOIS WATER TREATMENT CO. 8 4 0 C e d a r St. Rockford,
III.
NEW YORK OFFICE: 141 E. 44th St., N e w York 17, N.Y. C A N A D I A N DIST.: Pumps & Softeners, Ltd., London, C o n . Circle No. 30 A-2 on Readers' Service Card, page 69 A
