No Other Syringe Pump Approaches The Fantastic Range And Performance Of The New Sage Model 355
Mettler technical bulletin discusses thermal microscopy applications "Applications of Hot Stage Microscopy", a 20-page bul l e t i n by e m i n e n t t h e r m a l microscopist Dr. Walter C. M c C r o n e , describes h o w a u t o m a t i c t h e r m a l micro s c o p y is used to i d e n t i f y pure c o m p o u n d s , analyze the purity of mixtures and determine composition dia grams. Included are 47 illus t r a t i o n s ; 27 are f u l l - c o l o r photomicrographs. For your free copy of Bulletin M-3003, write Mettler Instrument Corporation, 20 Nassau St., Princeton, N.J. 08540.
Mettler®
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You can select any flow rate you want within a range of 25,000 to 1 using a single syringe. By using different size syringes, you can select rates from an overall flow rate range of more than 1 billion to 1, covering from less than a microliter/day to 140 ml/minute. And you get reproducible, uniform flow at any rate you use. Controls consist of just one switch and one ten turn dial, with a digital read-out. All information necessary to get the flow rate you want is right on the pump. A new syringe holder accepts up to three syringes at a time, and holds all types from microliter size to 100 cc capacity. Model 355 comes com plete and requires no accessories. It is designed for quick set-up and easy operation. Most important of all, the vast flow rate range of Model 355 is broad enough to meet all of your laboratory needs. Price: $475. Send for complete tech nical information today.
SAGE INSTRUMENTS, INC. Subsidiary of Orion Research Incorporated 230 Ferris Ave., White Plains, Ν. Υ. 10603 Telephone (914) 949-4121 Circle No. 42 on Readers' Service Card
VOL. 42, NO. 1, JANUARY 1970
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COLEMAN
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BUSINESS REPLY CARD NO POSTAGE STAMP NECESSARY IF MAILED IN THE UNITED STATES
POSTAGE WILL BE PAID BY
ANALYTICAL CHEMISTRY READERS' INFORMATION SERVICE 600 SUMMER STREET STAMFORD, CONN. 06904
Lowest costper-analysis with the Coleman Universal Spectrophotometer In l a b o r a t o r i e s w h e r e c o s t a n d high-volume analytical output are important, the Coleman Universal S p e c t r o p h o t o m e t e r is still u n equalled. The instrument draws its speed from two design features: . . . straightforward circuitry provides direct-deflection readings in terms of sample concentration. . . . a two-position sample carrier permits almost instantaneous comparison of unknown samples with the reference standard. Added to its high-volume output are these features : VERSATILITY—from high-speed routine s p e c t r o p h o t o m e t r y , t h e U n i versal readily adapts to the most painstaking measurements of fluorescence a n d light s c a t t e r i n g . . . from macro to micro volumes. A calibrated slidewire potentiometer permits ultra-precise null readings. EXTENDED RANGE—Universal uses a diffraction g r a t i n g t o p r o d u c e a straight and linear spectrum from 325 to 825 mu. Its constant band pass throughout the spectral range eliminates the need for mechanical slit adjustments. ACCURACY—results a r e r e p r o d u c ible to ± 0 . 2 % full scale; scale is linear to 0.5 ° 0 . Wavelength calibration easily kept within 0.5",',. In planning your laboratory instrumentation, consider cost-peranalysis . . . ask your dealer to demo n s t r a t e the C o l e m a n Universal. Send
for Bulletin
A-298
Write to Coleman Instruments The Perkin-Elmer Corporation. 42 Madison St.. Maywood, Illinois
Division, 60153
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