New Books Applied Numerical Analysis. Curtis F. Gerald, xii + 340 pages. AddisonWesley Publishing Co., Inc., Reading, Mass. 01867. 1970. $7.50
Numerical techniques of solving sci entific and engineering problems are of growing importance as numerical meth ods can give the solution when ordinary analytical methods fail; e.g., in finding the roots of transcendental equations, or in solving nonlinear differential equa tions. Another reason for the interest in numerical procedures is their inter relation with digital computers. Be cause computers operate essentially by repetitive arithmetic operation, compu ters are programmed to solve scientific problems by use of procedures known as numerical methods. The interaction is two-fold—numerical methods require the computer to do the calculations in all but the simplest cases; computers derive their program logic from the body of knowledge covered in numerical analysis. This text was prepared for the undergraduate student of mathe matics, engineering, or science. Knowl edge of the calculus is assumed, and al though an introductory course in differ ential equations is advantageous, it is not essential. The emphasis through out the book is on applications of nu
merical procedures, and many of the examples and exercises solve mathe matical models corresponding to real physical situations. An attempt has been made to bring error analysis to the level of the sophomore or junior student by avoiding formality in the statement of theorems and by less than rigorous demonstrations in many cases. While retaining the interrelationship between numerical analysis and com puter programming, the two subjects are treated concurrently but indepen dently.
PARR Provides a rapid and safe m e t h o d for dissolving glass, silicates, nitrides, rocks and other refrac tory materials in HF, HC1 and other strong mineral acids at tem peratures to 150° C. and pressures to 1200 psig. Acids do not attack this bomb and complete re covery is assured, includ ing any trace elements.
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74A
Dr. McGucken tells of the efforts made, and the success achieved, in un derstanding spectra during most of the 19th century, from William Hyde Wollaston's observation of dark solar lines in 1802 to J. J. Thomson's discovery of the electron in 1897. In this book, the focus is not on spectroscopic techniques or apparatus, but on the intellectual struggle to understand spectra. The author includes chapters on the quest for spectral series formulae, the evolu tion of qualitative spectral theories, and the attempts to develop a mathe matical theory of spectra. It is claimed that this is the only historical work in any language that fully treats the development of the theory of spec tra during the 19th century.
Divided into four major sections, this book is intended as a guide to the workings and instrumentation of the infrared spectrophotometer. The first section is introductory, the second de velops the fundamentals of geometric and physical optics, and optical sys tems, the third treats the electronics and electromechanical systems of the spectrophotometer, and the final part discusses the experimental methods of infrared spectrometry. It is intended
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Nineteenth-Century Spectroscopy. De velopment of the Understanding of Spectra 1802-1897. William McGucken. xii + 233 pages. The Johns Hopkins Press, Baltimore, Md. 21218. 1969. $11
Infrared Spectroscopy: Experimental Methods and Techniques. James E. Stewart. 656 pages. Marcel Dekker, Inc., 95 Madison Ave., New York, Ν. Υ. 10016. 1970. $36.50
ACID DIGESTION BOMB
The acid charge is held in a 25 ml. thick walled Teflon* cup within a sturdy metal bomb. The cup can be removed for convenient sample recovery and easy washing. No wrenches or clamps are needed to produce a tight seal. *duPont TFE flurocarbon resin Write for Data Sheet 4745
for advanced undergraduates and graduate students in the various disci plines in which infrared spectrophotom eters are used. It should also be of use to practicing spectroscopists.
ANALYTICAL CHEMISTRY, VOL. 42, NO. 1 1 , SEPTEMBER 1970
New members will also receive the two most recent available i s s u e s of Symposia P r e p r i n t s in addition to c u r r e n t P r e p r i n t s . Circle No. 111 on Readers' Service Card
