ANALYTICAL MICRO MILL
Small wonder T h e P O R T A - T E M P is a c o n s t a n t t e m p e r a t u r e bath heater, controller, stirrer and circulator. This versatility is p a c k e d i n t o a c o n v e n i e n t l y p o r t a b l e unit o n l y β ' Α " χ 7V4" χ 1 3 " high and weighing only 8 pounds.
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Mount the PORTA-TEMP in a n y s u i t a b l e c o n t a i n e r — j u s t p l u g it in f o r a c o n s t a n t temperature b a t h — a d d two pieces of t u b i n g f o r a c i r c u l a t i n g s y s t e m . M a i n t a i n s b a t h at any t e m p e r a t u r e u p t o 100C w i t h a u n i f o r m i t y o f ± 0 . 1 3 C .
P O R T A - T E M P w i l l h e a t an u n i n s u l a t e d .' f i v e - g a l l o n j a r of w a t e r f r o m 25C t o 50C in 34 m i n u t e s . W i l l p u m p u p t o 120 l i t e r s p e r h o u r at 0 " h e a d a n d c i r c u l a t e water up to 48" h e a d . Get complete PORTA-TEMP data from your Precision Scientific Dealer or w r i t e us f o r B u l l e t i n 629. P r e c i s i o n S c i e n t i f i c C o m p a n y , 3737 W . C o r t l a n d S t r e e t , C h i c a g o , I l l i n o i s 60647. PRECISION
2 0 - 5 0 ML SAMPLES GROUND INSTANTLY Stainless steel blade rotating at speeds up to 20,000 r.p.m. reduces small samples to minute size in a matter of moments. Ultimate particle size depends upon sample material and length of run. Grinding chamber is closed during milling operation to rule out sample loss. Built-in safety switch assures operator protection. Stainless steel chamber may be quickly disassembled for autoclaving or cleaning. Serrated hose connections to jacket surrounding grinding chamber permit circulating cold tap water or direct coupling with constant temperature circulator. Some materials already successfully milled are: BONE PHARMACEUTICALS PLASTICS CERAMICS SOIL CHEMICALS TEETH COAL TISSUES • LIVER FERTILIZER • MUSCLE FROZEN TISSUES • PLANT GRAIN • SKIN 9"H χ 5"W χ 6"D overall. For 115 Volts. Cat. No. 6-030100 Mill $149.50 Available from major lab supply dealers. Ask for BULLETIN 171
ûméer Quaafyproduct from.
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P A C K A R D INSTRUMENT C O M P A N Y , INC. Becker Chromatography Division 2200 W a r r e n v i l l e R o a d , D o w n e r s G r o v e , I l l i n o i s 60515 S e n d a c o p y of C a t a l o g 1124 a n d s e e if it w i l l c h a n g e m y t h i n k i n g . Name & Title_ Company Address City
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ANALYTICAL CHEMISTRY, VOL. 42, NO. 12, OCTOBER 1970
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