For scientific spelunkers Garden variety spelunkers explore caves. And good equipment helps insure their safety. That's what Blickman's small lead caves are for. They help scientists safely explore and process radioisotopes for medical, biological, agricultural or industrial use. The job may be dissolving, blending, mixing, filtration, use of centrifuges, filling containers or you name it. These junior size lead caves can be adapted to a variety of small manipulators. You get great flexibility with maximum security. Blickman has tailor-made lead caves for many institutions or companies such as Squibb and Union Carbide. You can share in this experience. The coupon gets you a catalog on radioisotope and other safety enclosures.
S. Blickman Inc. 9610 Gregory Ave. Weehawken, N . J. 07087 Please send safety e n c l o s u r e catalog. Name
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ANALYTICAL CHEMISTRY
NEW BOOKS
The author masters the topics well and shows this at once in the initial clear discussion of the various units, their dimensions, and the unfortunate situation with respect to differences in different systems and by different authors. The author is equally wyell at home in practical matters. Theory and practice are somewhat interdispersed. This fact does not hamper the nice and logical flow of presentation when one reads the book. But it is rather unfortunate if one tries to use the volume as a reference. For example, the delicacy of cleaning a slit and the performance of this task are described on page 45 preceded and followed by theoretical considerations. Similarly, the section on preparation of samples is intermingled with the description of purification of solvents. Apropos "preparation of samples," this extensive and valuable chapter is placed between the description of monochromators and light sources. The logic of this placement is hard to follow. The description and evaluation of spectrophotometers is not biased towards instruments of German origin. Apparatus of British or American prominence are dealt with equally well. If able to handle the intricacies of scientific German, a reader in this country will benefit from these sections of the book. However, only more sophisticated instruments are described. No discussion of filters (interference or others) is found, or at least these topics have no relevant entries in the subject index. The theory of the origin of absorption spectra is treated in length, possibly with the organic chemist predominantly in mind. Inorganic analysis falls quite short and examples of applications are restricted to a mere two pages. A welcome feature of the book is an appendix containing standard spectra and conversion tables. This appendix is in form of a separately bound brochure which greatl}· facilitates its use. The book is well-written and its make-up is excellent. It will provide for man}' what they hope to find. But some will not find what they may be looking for. Quantitative Analysis, Second Edition. R. A. Day, Jr., A. L. Underwood, xiii + 482 pages. PrenticeHall, Inc., Englewood Cliffs, N. J. 07632. 1967. $9.95. Reviewed by William, P. Schaefer, Department of Chemistry, University of California, Davis, California. This is the second edition of a text originally published in 1958. The aim then was to provide both classical and
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