improved for longer burner life BETHLEHEM BENCH BURNER Improvements in the design and construction of this general-purpose gas-oxygen burner offer you these distinct advantages— longer life of the burner head, by increasing the cooling area through the use of more fins and an aluminum heat sink surrounding the gear rack, for more effec tive conductivity. maintains high rate of heat dissipation, by the use of chrome plated brass body and fins. improved fuel control as a result of cooler operating needle valves. faster, easier settings with angle adjustment knobs on both sides of burner. PM2D $165.00 Model Β With bracket mount, the burner may be used as a lathe fire—small or large flame at any angle.
BA
BETHLEHEM APPARATUS C O M P A N Y , INC. HELLERTOWN, PA. Circle No. 28 on Readers' Service Card
HOW MUCH EFFICIENCY AND ACCU RACY COULD YOUR LAB GAIN IF YOU COULD AVOID COSTLY, DELAYING ...: TIE-UPS due to maintenance problems? This unique new book offers your personnel a practical, working manual for operating and troubleshooting such automated systems as AutoAnalyzer, Ro bot Chemist, Perkin-Elmer Atomic Absorp tion Spectrophotometer, Mecolab, Spectrophor I electrophoresis unit, BSL com puter system and Autotechnicon Ultra. Superbly illustrated, it discusses automated serologic tests for syphilis; in vivo techni ques,their use and application. Order YOUR copy today on FREE 30-day approval. By WILMA L. WHITE, B.A., Supervisor, Clinical Chemistry Labora tory; MARILYN M. ERICKSON, B.S., Supervisor, Clinical Chemistry Laboratory, both of Barnes Hospital, St. Louis; and SUE C. STEVENS, B.A., M.A., Ph.D., Director, Division of Endocrine Chemistry, Jewish Hospital, St. Louis. Published March, 1968. 413 pages, 7"x 10", 242 illus. Price, $14.50.
MOSBY The C. V . M O S B Y C O M P A N Y , Publishers 3207
Washington.,
St
Louis
Mo.
63103
Please send m e a copy of t h e new W h i t e - E r i c k s o n - S t e v e n s , PRACTICAL AUTOMATION FOR THE CLINICAL LABORATORY, p r i c e d at $14.50, on 30-day a p p r o v a l . Save delivery charges by i n c l u d i n g r e m i t t a n c e w i t h t h i s order. Π Bill me Name Π Payment enclosed Address(Same r e t u r n -Zip_ privilege) City -StateAC568
^J^JîeilebaËîÉiÉÉ
Circle No. 86 on Readers' Service Card
80 A
•
ANALYTICAL CHEMISTRY
NEW BOOKS the Determination of Surface Area, Porosity, and Particle Size," chaired by H. van Olphen. The sessions cover electron, optical, and x-ray methods of chemical and structural analysis. Given below are the titles and authors of the technical contributions: X-Ray Diffractometry Methods for Complex Powder Patterns, William Parrish; Energy Dispersion X-Ray Analysis Using Radioactive Sources, William J. Campbell; Quantitative Electron Microprobe Analysis, Robert E. Ogilvie; Determination of Specific Surfaces by Small-Angle X-Ray Scattering Methods—A Brief Review, H. Brumberger; Determination of Particle-Diameter Distributions by Small Angle X-Ray Scattering; Paul W. Schmidt, Charles G. Weil, Orville L. Brill; Small-Angle X-Ray Scattering and Low-Energy Electron Diffraction Studies of Catalyst Surfaces, Gabor A. Somorjai; and The Analysis of LowAngle Light Scattering from Simple Mixtures, Donald Caulfield, Yung-Fang Yao, Robert Ullman. A subject index is included. Modern Aspects of Reflectance Spectroscopy. Westey W. Wendlandt, Editor, χ + 25% pages. Plenum Publishing Corp., 227 W. 17th St., New York, Ν. Υ. 10011. 1968. $12M0. This volume contains the proceed ings of the American Chemcial Society Symposium on Reflectance Spectros copy, held in Chicago, 111., Sept. 11 to 12, 1967. Presented are 21 technical papers and author and subject indexes. The papers cover a broad range in the instrumentation, techniques, and appli cation of reflectance spectroscopy. The book has been produced by photo off set of typewritten copy. NMR Band Handbook. Herman A. Szymanski, Robert E. Yelin. xiv + 482 pages. Plenum Publishing Corp., 227 W. 17th St., New York, Ν. Υ. 10011. 1968. $40. This reference work contains tables of data to be used by research workers interested in locating chemical shifts for protons in a given environment. The significant bands in the NMR spectra of some 1200 compounds have been indexed according to an alphanu meric code based on structural config uration. Entries with the same code designation are arranged in order of increasing chemical shift. Each entry lists all the bands that appear in the spectrum of the compound. The cod ing of protons is that used in Varian catalogs. The book should provide a valuable tool for the identification of compounds.
