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New Books Diffraction Grating Handbook. Staff of the Bausch & Lomb Diffraction Grat­ ing Research Laboratory, Erwin G. Loewen, Director. 60 pages. Bausch & Lomb, Analytical Systems Division, 820 Linden Ave., Rochester, N. Y. 14625. 1970. Paperbound. $2.50 (priced lower in quantities of 50 or more)

One section of the handbook de­ scribes in detail the fundamentals of grating physics. This section is of spe­ cial significance as it collects in a few concise pages information which one would otherwise have to compile from many textbooks and research pa­ pers. A history of diffraction grating technology, a description of the David Richardson Grating Laboratory in Rochester, and discussions of ruling en­ gines and grating replication are also included in this handbook. Other sec­ tions of this book discuss the blazing of gratings as it affects reflection and transmission, the testing of gratings, different applications, including unusu­ al uses such as satellite spectroscopy and the calibration and electron mi­ croscopes, overcoatings, and general ad­ vice on the selection and use of grat­ ings. This compact volume should be a very useful reference and teaching source for industry, research, and edu­ cation.

THREE Good Reasons Buchler is the First Name in Flash Evaporators Universal Models for batch or continuous operation. Heavy duty Performance.

2 Portable Model with Dewar Condenser for operation with dry ice. Performs evaporation of heat sensitive materials at room temperature. Continuous feed.

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Progress in Nuclear Magnetic Reso­ nance Spectroscopy, Vol. 5. J. W. Emsley, J. Feeney, and L. H. Sutcliffe, Editors. vii + 406 pages. Pergamon Press, Ltd., Maxwell House, Fairview Park, Elmsford, Ν. Υ. 10523. 1970. $18.50

This is the fifth volume in a series concerned with nuclear magnetic reso­ nance spectroscopy, one of the most rapidly expanding branches of chemis­ try. This expansion is taking place over a wide front, embracing not only the fundamentals of the subject but also instrumentation and applications of the technique to a host of structural and analytical problems. This series was to make available a continuous supply of up-to-date authoritative re­ views dealing with topics of current in­ terest. The three articles composing this volume include: the INDOR technique in high-resolution nuclear magnetic resonance, magnetic nonequivalence related to symmetry consider­ ations and restricted molecular motion, and applications of Ή nuclear magnet­ ic resonance spectroscopy to the con­ formational analysis of cyclic com­ pounds. An author index and a subject index are also included. This volume will prove valuable to nuclear scientists, chemists, and physicists.

Portable Model with Spiral Condenser and Thermo-Lift temperature controlled heating bath. Height of bath may be adjusted from 8" t o 16".

To evaporate aqueous solutions, high boiling point solvents, strong acids, alkalis and radioactive mat­ erials without contaminating back-drip. Distillation occurs only within glass and Teflon, preventing c o n t a m i n a t i o n . Balanced design permits smooth

rotation

w i t h o u t d r a g a n d l a r g e r o u t p u t w i t h o u t loss of m a t e r i a l . C o n t i n u o u s f e e d of s o l u t i o n or i n e r t gas. No O-rings w a s h e r s n e c e s s a r y . Easy c o n v e r t i b i l i t y f r o m o n e

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to a n o t h e r . FOR FURTHER INFORMATION SEND FOR TECHNICAL BULLETINS

BUCHLER INSTRUMENTS DIVISION NUCLEAR-CHICAGO A SUBSIDIARY OF G. D.

SEARLE

CORP. &

CD.

1327 SIXTEENTH STREET, FORT LEE, NEW JERSEY, 07024 Circle No. 12 on Readers' Service Card

ANALYTICAL CHEMISTRY, VOL. 42, NO. 9, AUGUST 1970

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