new c o n c e p t s in scientific
glassware NEWS
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CHEMOSTAT . . . a continuous, automatic culture apparatus for growing microorganisms with controlled density and growth . ., , rates. Full control is offered by r , ν Λ variation of growth factor in nuAii W trient and a timer that feeds nu trient at selected rates. Complete with control cabinet and all glass ware. Single unit. S355.00. Dou ble unit, $575.00. Ask for Chcmostat Bulletin A. METABOLISM CAGE . . . for carbon-14 tracer studies in rats and mice. The only available ap paratus for total control of input and collection for metabolic proc esses. Unique method separates feces and urine . .2 . virtually total absorption of CO . Complete sys tems in 3 cage sizes; 3·/2" for mice, S252.25; 6" for rats, $298.25; 8" for guinea pigs, $350.00. Ask for Metabolism Cage Bulletin A.
FAT EXTRACTOR (Wistreich) for rapid moisture and fat determination. Reduces 24-hour task to 3 hours (proven against AOAC method, correlation coefficient .99). Apparatus includes reflux condenser, receiver arm and special 780 ml flask with two compartments arranged so solvent returns from condenser di-
Delmar
SCIENTIFIC LABORATORIES
317 MADISON ST., MAYWOOD, ILL.
Industrial Hygienists will be held in conjunction with the A I H A . T h e technical sessions will include papers on the determination of inor ganic materials in air a n d biological samples, instrumental laboratory m e t h ods of air analysis, air pollution, gas c h r o m a t o g r a p h y in industrial hygiene, field analysis, and detection instruments in industrial hygiene, sample collection methods a n d techniques, and panel dis cussion of field indicators in industrial hygiene. Copies of the 1961 preliminary p r o gram are available from t h e A I H A , 14125 Prévost, Detroit 27, Mich. R e f r e s h e r C o u r s e s . One-day teaching sessions intended to bring particip a n t s u p to date on specific techniques of industrial hygiene will be offered in conjunction with the meeting. Typical topics a r e dust counting with the phase microscope, identification of solvent mixtures, a n d permissible dose for external radiation. Registration is limited for each course. A full list of courses a n d registration details a r e available from M r . George Clayton, A I H A Executive Secretary, 14125 P r é vost, D e t r o i t 27, Mich.
rectly to inner compartment. On com pletion of the process, fat has collected in the graduated receiver, solvent is in the inner flask cell and moisture has been dissipated or collected. Price com plete . . . only $75.00 each. For full details, ask for Fat Extractor Bulletin A.
Modern glassware systems for vacuum, distillation, special purposes; plus accessories, tools, gauges, valves, etc. Write for Catalog 60-DA
A SUBSIDIARY OF COLEMAN INSTRUMENTS, INC. Circle No. 121 on Readers' Service Card
N A T I O N A L
Canisius College Gas Chromatography Institute
APPLIANCE
CHROMATOGRAPHY OVEN A p r o v e n , h a z a r d - s a f e o v e n for m o r e efficient, safer d r y i n g of c h r o m a t o g r a m s . H e a t e d a i r rises g e n t l y o v e r c h r o m a t o g r a m s a n d is e x h a u s t e d through 3 " diameter vent, 8 C F M . M a y be vented through hood or exh a u s t s y s t e m . T e m p e r a t u r e is c o n trolled b y accurate, calibrated hydraulic thermostat from room to 1 2 0 ° C . M a i n s w i t c h selects e i t h e r r o o m - a i r or heated-air drying. In t e r i o r is c o m p l e t e l y stainless steel. O p e n - f r o n t , s w i n g - o u t r a c k is e a s y to load a n d unload. P l a t e n h e a t i n g e l e m e n t is l i m i t e d t o 2 6 0 ° C . b y a f a c t o r y - s e t safety t h e r m o s t a t . B l o w e r is n o n - s p a r k i n g and corrosion-proof. Dial t h e r m o m eter indicates temperatures from 4 0 ° to 1 5 0 ° C . M a i n switch, thermostat, p i l o t light a n d t h e r m o m e t e r a r e all i n c l o s e d in v a p o r - t i g h t i n s t r u m e n t p a n e l . E x t e r i o r is finished i n d e e p bronze enamel, durable and eyeappealing. Write for bulletin or complete
N A T I O N A L
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