READERS' I N F O R M A T I O N SERVICE
RAPID, ACCURATE, DIRECT READING
Photoprocessing Units 75 A-4 Plastic Trays, Semi-Micro Bottles . 4 A-3 Platinumware 24 A Polarimeters 55 A-2, 75 A-7 Porcelain Equipment Catalog . . . 30 A-l Presses, Hydraulic . . . . 31 A-2, 59 A-l Presses, Pellet 33 A-2 Protective Devices, Distilled Water 8 A-4 Pumps, Bottle 8 A-l Reaction Flasks 54 A Refractometers 4th Cover, 75 A-6 Scalers, Precision 77 A Sinks, Porcelain 13 A Spatulas, Magnetic 74 A-2 Spatulas, Semi-Micro 4 A-2 Spectrographs 75 A-2 Spectrometers, Fore-Prism Grat ing 36 A-l Spectrometers, Nuclear Magnetic Resonance 29 A Spectrophotometers 75 A-l Spectrophotometers, Recording. 5 A, 6 A, 37 A Stills, Water 8 A-2 Stirrers 25 A, 31 A-l, 35 A-l Temperature Indicating Devices, Thermistor 39 A Thermometers 3-1 Cover Tubing, Plastic 38 A-2, 66 A Tubing, Rubber 38 A-l Viscometers 58 A-2, 69 A Voltage Regulators 44 A X-Ray Units 75 A-8
CHEMICALS A M D MATERIALS Acetic Acid Adsorbents Ammonium Hydroxide Dimethylformamide Hydrochloric Acid . . . Hydrofluoric Acid laboratory Reagent» . Lithium Mercuric Chloride Methylene Chloride Nitric Acid Nitroparaffins Osmium Tetroxide Perchloric Acid Sulfuric Acid Trichloroacetic Acid
49 A-l, 2-3 Cover 10 A 2-2 Cover 71 A-l 49 A-2, 2-1 Cover 49 A-3 . . . 21 A, 63 A-l 67 A 63 A-2 71 A-4 49 A-4 9A 71 A-3 49 A-6 49 A-5, 2-4 Cover 71 A-2
~7/Lu.tt£.e.LBALANCES including SEMIMICRO a n d M I C R O
MISCELLANEOUS Catalog, Chromatography Equip ment 14 A-l Catalog, Custom-Ms de Glassware 52 A Catalog, Electrophoresis Equipment 14 A-2 Catalog, Porcelain E q u i p m e n t . . . 30 A-l Chart, Filter Papers ". 23 A-2 Infrared Spectra 36 A-2 Reference Manual, Instruments . 65 A-2
Ιβββ-C.
PUCE STAMP HERE
• RAPID, ACCURATE WEIGHING— By dialing built-in weights in less t h a n 3 0 seconds • DIRECT READING • SINGLE P A N • CONSTANT SENSITIVITY
READERS' INFORMATION SERVICE Analytical Chemistry 430 Park Avenue New York 22, Ν. Υ.
ANALYTICAL CHEMISTRY Readers' Information Service April 1956—Valid through September 1956
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1 8 8 8 - C i Balance, Semimicro, Mettler B-6, similar to 1867-J but with capacity 100 grams, accuracy within optical range + 0.02 mg, accuracy of entire set of weights ± 0 . 1 mg, and with magnifier-light shield 995.00 1 8 8 8 - M . Balance, Microchemlcal, Mettler M - 5 , with recently improved damping device, capacity 20 grams, accuracy within optical range + 0.002 mg, accuracy of entire set of weights ± 0.02 mg. With front radiation shield and magnifier-light shield 1,380.00 Copy of Bulletin 127 sent upon request.
New Chemicals
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1867-J. Balance, Analytical, Mettler B-5, capacity 200 grams, ac curacy ± 0 . 1 mg. With air damper and transformer for 110, 125, 145 or 220 volts, 50 or 60 cycles a.c, but without magnifier-light shield 895.00
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ARTHUR H. THOMAS CO. Laboratory Apparatus and Reagents P. O. BOX 779 PHILADELPHIA 5, PA. More and more laboratorlet MLY ON THOMAS Circle Nos. 62 A-l, 62 A-2 on Renters' Service Card, page 61 A
