BOOK
reference purposes there are also included photographic ohemicals and accessories; much of this latter information is not particularly new and would appear to be similar to information offered by the manufacturers. Probably one of the most valuable contributions in the book is a collection of photomicrographs, d l of which were taken bv the author. These pictures are nearly ill printed one to a page with s. brief history of each specimen, plus complete information on how the mremgraph artistically, the use of perspective often was taken, including optics and illuminagives a truer representation of the appartre, tion employed, exposure, filters, staining tus illustrated, but frequently the older (if any), photographic materials, and diagrams had a clarity and directness magnification. which is lacking in some of the new illusThe information on photomicrographic trations. Figure 2-1 has been reduced technique which appears to be the essential too far: the inches and centimeters are reason for writing the book makes it of only 80 per cent as long as they should be. value as a teaching aid or reference book. The typography is pleasing. While some of the contents are not new WALTERB. KEIGHTON they are presented in suoh a manner as to be of value to most microscopists doing Swarthmore College photomicrography. Such discussions as Swarthmore, Pennsylvania "oommon faults of photomicrography" and others dealing with light sources, magnification, fuzzy fields, and exposure, make this edition a practical working Photomicrography microscopist's handbook. The usefulness of photomicrography is emphasined Roy M . Allen, Fellow and Past Presiby the many micrographs used to illustrate dent, The New York Mioroscopical the book. Society. 2nd ed. D. Van Nostrand The various types of optical microCo., Inc., Princeton, N. J., 1958. scopes inchlde polarizing, phase, dark 441 pp. 235 figs. 54 plates. xiii field, metallography, interference, fluores16 X 23.5 om. $9. cent. and ultraviolet. In addition, a This second edition includes many of the short ohapter on the electron microsoope is developments in instrumentation which included. While this chapter on the elechave oocurred during the 17 y e m since tron microscope does familiarize the publication of the first edition. The reader with such instruments, it is unlikely author comments on most of the instruthat the practicing electron microscopists ments commercially available at the can find much of interest. present time. Pictures of these instruNot only will the amateurs gain from the ments are also included. Micmscopea, section an homemade equipment but the illuminators, cameras and phatomicroprofessional may also obtain some useful gaphio items are all included in the disideas. The author fully understands the cussion on equipment. The discussion problem associated with the high cost of on the self-contained "universd" units is equipment which faces nearly all amateurs. especially interesting and helps to clarify It gives many useful and prwtical suggestions on how to construct equipment. the large number of things to consider before purchasing such a unit. Each has RAYR. K E A ~ ~ E S its own advantages and stmng points, Amerimn Cyanamid Company depending on ultimate use. For handy Bound Brook, New Jersey
REVIEWS
The Fundamentals of College Chemistry
G. Brooks King, The State College of Washington, and William E. Caldwdl, Oregon State College. 3rd ed. American Book Company, New York, 1959. 592 pp. 14.5 X 22 cm. $6.25. vii
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The text has been reworked with a resulting gain in ease of understanding. There are few changes of a drastic nature and very little of the material of the previous edition has been omitted. Among the sections added or improved by rewriting are those on the activity series, effusion and ddiusion, physical and chemioal atomic weights, oxidation numbers, balancing oxidation-reduction equations, the products of oxidation and reduction, metal hydrides, detergents, and the naming of the higher hydrocarbons. The chapter formerly titled Chemical Equilibrium becomes Reaction Rates and Chemical Equilibrium and the chapter on Radioaetivity and Nuclear Changes has been revised and now includes material on the fundamental particles of matter, massenergy relationships, nuclear power plants, binding energy, the hydrogen bomb, peacetime uses of atomic energy, and radioactive dating. An appendix has been added on oxidation-reduction potentials. A few exercises have been dropped, but rephoed with new ones. Some of the references have been deleted, but replaced by twice as many new, and more recent, references. The illustrations have been redrawn. The diagrammatic line drawings of the second edition are supplanted by perspective drawings done on a hackground of grey wash. The juxtaposition of greys and whites is more interesting
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Mars Transfer Between Phases
Thomas K . Shewoat, Prof. of Chemical Engineering, MIT. Phi Lambda. U p d o n , Department of Chemistry, Pennsylvania State University, University 86 pp. 23 figs. Park, Pa., 1959. xi 21.5 X 27.5 cm. Paperbound. $2.75.
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The old mader does it anain. These at the Pennsylvania State University, April, 1959. This presentation, although only 80 typewritten pages in length, is a brilliant review of the present knowledge of mass transfer between two nhases. The disr n ~ i o nin this series hss been restrir.ted to
Volume 36, Number 1 I , November 1959
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