Advertisement/Classifieds
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IMMERSION CIRCULATORS Double first! See our brand new advanced temperature controllers * . Model TU-14 ± 0.005°C . $: Model TE-7 ±0.02°c| 4 Solid state controls: pump . 2 standard: overheattoMiqaid level safety •—τ& κ^η^^ρ-~ _| temperature facility AVAILABLE THROUGH LEADING LABORATORY SUPPLY HOUSES CIRCLE 203 ON READER SERVICE CARD The most intelligent microbalance The new AD-2Z Autobalance with both Autoranging and Autozero It can set zero, balance the beam, select the best range, shift the decimal, display the weight on a large digital readout, print it (with an optional printer) and much more ... all automatically and within seconds. That's what all microbalances should do, but only the AD-2Z does. 5 gram capacity, 0.1 microgram sensitivity. Recording and vacuum models available. Call your local Perkin-Elmer sales office, or write Instrument Division, Perkin-Elmer Corporation, Main Av- enue, Norwalk, CT 06856. PERKIN ELMER Thomas Edison, Chemist by Byron M. Vanderbilt Comments from the reviewers: "A very well-written, highly informative and often fascinating account of the important contributions of Thomas Edison to chemical technology.... The treatment is not too technical for the general reader, but also of great interest to those with technical training. This book is warmly recommended." Aslib Book List "At last we have something I have been hoping for a long time; a serious and complete appraisal of Father's work with no nonsense. Most biographers leave him stranded with the electric light when he was in his thirties and I have reason to know that a great deal happened after that." Mrs. Madeline Edison Sloane "This is not another biography. Rather it evaluates critically what Edison did in the field of applied chemistry and compares his achievements with those of his contemporaries. " Durham Morning Herald "The story is a strong one and . . . Dr. Vanderbilt tells it well.... All the essential chemistry and technology is presented in a way accessible to the general reader. " New Scientist Chapters The Youthful Chemist... Chemistry of the Light Bulb . . . Accessories for the Electric Light... Materials for the Phonograph .. . Iron Ore Concentration .. . Venture in Cement and Concrete . . . The Amazing Alkaline Storage Battery . . . Organic Chemicals and Naval Research . .. Rubber from Goldenrod . . . Edison's Place in the Chemical Fraternity 374 pages, with index, clothbound (1971) $8.50 postpaid in U.S. and Canada, plus 40 cents elsewhere. Order from: SPECIAL ISSUES SALES American Chemical Society 1155 Sixteenth St., N.W. Washington, D.C. 20036 CIRCLE 175 ON READER SERVICE CARD 876 A · ANALYTICAL CHEMISTRY, VOL. 48, NO. 11, SEPTEMBER 1976 Techne Incorporated 3700 Brunswick Pike Princeton New Jersey 08540 609 452 9275 iraim
Transcript of Advertisement/Classifieds
IMMERSION CIRCULATORS Double first!
See our brand new advanced temperature controllers * .
Model TU-14 ± 0.005°C . $: Model TE-7 ± 0 . 0 2 ° c | 4 Solid state controls: pump . 2 standard: overheattoMiqaid level safety •—τ&·κ^η^^ρ-~ _| temperature facility
AVAILABLE THROUGH LEADING LABORATORY SUPPLY HOUSES
CIRCLE 203 ON READER SERVICE CARD
The most intelligent microbalance
The new AD-2Z Autobalance with both Autoranging and Autozero
It can set zero, balance the beam, select the best range, shift the decimal, display the weight on a large digital readout, print it (with an optional printer) and much more . . . all automatically and within seconds. That's what all microbalances should do, but only the AD-2Z does. 5 gram capacity, 0.1 microgram sensitivity. Recording and vacuum models available.
Call your local Perkin-Elmer sales office, or write Instrument Division, Perkin-Elmer Corporation, Main Avenue, Norwalk, CT 06856.
PERKIN ELMER
Thomas Edison, Chemist by B y r o n M . V a n d e r b i l t
Comments from the reviewers: "A very well-written, highly informative and often fascinating account of the important contributions of Thomas Edison to chemical technology.... The treatment is not too technical for the general reader, but also of great interest to those with technical training. This book is warmly recommended."
Aslib Book List
"At last we have something I have been hoping for a long time; a serious and complete appraisal of Father's work with no nonsense. Most biographers leave him stranded with the electric light when he was in his thirties and I have reason to know that a great deal happened after that."
Mrs. Madeline Edison Sloane
"This is not another biography. Rather it evaluates critically what Edison did in the field of applied chemistry and compares his achievements with those of his contemporaries. "
Durham Morning Herald
"The story is a strong one and . . . Dr. Vanderbilt tells it well.... All the essential chemistry and technology is presented in a way accessible to the general reader. "
New Scientist
Chapters The Youthful Chemist . . . Chemistry of the Light Bulb . . . Accessories for the Electric L igh t . . . Materials for the Phonograph . . . Iron Ore Concentration . . . Venture in Cement and Concrete . . . The Amazing Alkaline Storage Battery . . . Organic Chemicals and Naval Research . . . Rubber from Goldenrod . . . Edison's Place in the Chemical Fraternity
374 pages, with index, clothbound (1971) $8.50 postpaid in U.S. and Canada, plus 40 cents elsewhere. Order from: SPECIAL ISSUES SALES American Chemical Society 1155 Sixteenth St., N.W. Washington, D.C. 20036
CIRCLE 175 ON READER SERVICE CARD
876 A · ANALYTICAL CHEMISTRY, VOL. 48, NO. 1 1 , SEPTEMBER 1976
Techne Incorporated 3700 Brunswick Pike Princeton New Jersey 08540 609 452 9275 iraim
