NEW BOOKS

other than petroleum in which the petroleum industry is interested; vol­ume 1 published October 1961 covers only petroleum products. Analytical methods included are: a new method for determining gas content by dis­placement with C0 2 (in insulating oil) ; new tests for acidity and polar con­tamination in used transformer oils by spot tests; a new method of test for traces of thiophene in benzene using isatin and spectrophotometry.

Specifications and standards relating to the following are included: bitumi­nous road and paving materials, con­crete joint sealing compounds, bitumi­nous materials for roofing and water­proofing, carbon black, electrical in­sulating liquids, gaseous fuels, aromatic hydrocarbons, paints and lacquers, wax polishes, quality control, and spectros­copy.

The book also contains definitions of terms for density and specific gravity

of solids, liquids, and gases, and defini­tions of terms relating to absorption spectroscopy.

The book is completed by an index covering both Vols. I and II.

ACTA IMEKO 1961. Volumes I to V . Scientific Society of Measurement and Automation, Buda-pest, Hungary. 1962. No price given.

The proceedings of the Second Inter­national Measurement Conference held at Budapest, Hungary, June 26 to July 1, 1961, are presented in five volumes.

Volume I covers metrology and prob­lems encountered in measuring systems. Delegates from 26 countries presented views on the diverse terminology used with modern measuring techniques, the accuracy necessary in the instruments used and in the machines which build the instruments, the setting up of new standards, the redetermination of phys­ical constants, automation, and the use of computer techniques.

Volume II covers the marginal fields related to measurement and automa­tion. Process control systems and re­lated measuring instruments are dis­cussed critically.

Volume III presents geodetic meas­urements and topics such as modern vibration test instruments and inter-fcrometric dilatometry.

Volume IV deals with instruments used in photometry, spectroscopy, colorimetry, electrochemistry, and gas analysis. The measurement of very high temperatures necessitates a redefi­nition of temperature and of the physi­cal basis of its concept.

Volume V covers extensively instru­ments and measuring procedures for electrical and magnetic quantities and radioactivity.

Critical reviews of these books are scheduled to appear in future issues of ANALYTICAL CHEMISTRY.

Rapid Microchemical Identification Methods in Pharmacy and Toxi­cology. Felix Amelink. vi + 121 pages. John Wiley & Sons, Inc., 440 Park Ave., South, New York 16, Ν. Y. 1962. $9.00.

Gas-Liquid Chromatography. Ste­phen Dal Nogare, Richard S. Juvet, Jr., xviii + ^50 pages. John Wiley & Sons, Inc., Interscience Division, 4.40 Park Avenue South, New York 16, Ν. Υ. 1962. $13.95.

For Recording pH

Actual laboratory application showing Sargent Con­stant Rate Burette with Magnetic Stirrer, pH RE­CORDING ADAPTER, and Model SR Recorder.

SARGENT pH RECORDING ADAPTER OFFERS HIGH SENSITIVITY 1 millivolt per pH unit EXCELLENT STABILITY Drift less than 0.01 pH/hour

FLEXIBILITY Output adjustable to give full scale recorder deflection for 1 to 14 pH

• LOW COST

Extreme resistance in electrode or solution is completely compatible with Sargent or other high quality potentiometric recorders through this new instrument, which transmits potential without distortion but converts impedance to lower values. An electrometer circuit—stable, linear and of high resistance—provides smooth, non-interrupted conversion with output at maximum sensitivity approxi­mately 1 millivolt per pH unit. Adjustable sensitivity and variable displacement give flexibility in setting pH range of the recorder. Accommodates standard commercial glass and reference electrodes.

For pH titration, the Sargent Constant Rate Burettes, which may be synchron­ously driven from Sargent Recorders, are useful adjuncts. S-72172 pH ADAPTER-Sargent Recorder. Without electrodes $150.00

Designed and Manufactured by E. H. Sargent & Co.

Write for Bulletin RA

SARGENT SARGENT SCIENTIFIC LABORATORY INSTRUMENTS · APPARATUS · SUPPLIES • CHEMICALS

Circle No. 94 on Readers' Service Card

E.H. SARGENT & CO.,4647 W.FOSTER AVE..CHICAGO 30,ILL Detroit 4, Mich. · Dallas 35, Texas · Birmingham 4, Ala. · Springfield, New Jersey * Anaheim, Calif.

7 2 A · ANALYTICAL CHEMISTRY