Reviews of Books Hydrogen: Its Technology and Implications. Vol. &Hydrogen Properties. By R. D. MCCARTY. Ed, K. E. Cox and K. D. WILLIAMSON. (C.R.C. Press, Cleveland, Ohio, 1975). Pp. 321. Price $46.00. In recent years we have seen the publication of extensive, accurate thermodynamic tables of many of the simpler substances, especially the permanent gases. These tables of the proprties of hydrogen are based on ones prepared by R. D. McCarty under the auspices of the National Aeronautics and Space Administration and they fit into this category. In view of the author’s experience and his use of the most up-to-date procedures in making his correlations, the result must be considered as representing the present state of the art as far as the generation of tables of properties of this sub- stance is concerned.Properties are tabulated for both normal and parahydrogen over the whole fluid range up to 1 kbar and 3000K in SI units. They include volume, enthalpy, entropy, C,, Cv, speed of sound, thermal conductivity, viscosity and dielectric constant. Various derivatives are listed also although the headings to some of these are incredibly cryptic. One labelled “ ISOTHERM DERIVATIVE CU M-MPA/KG ” in most of the tables but labelled “ Isotherm derivative, m3/MPA/kg ” in the saturation table was particularly confusing. Nowhere in the text is the term explained and from its proximity to the tabulation of volume one might expect it to be -(aV/W)~with units m3/(MPa kg), often erroneously written m3/MPa/kg. In fact, the numbers tabulated make sense only if one interprets them as ( W l a p ) ~ , the units in the saturation table being the ones that are wrong.Unfortunately, this ambiguity is not an isolated case. There are graphs with insufficient informa- tion on them (and no explanation in the text), properties tabulated twice but with two different values. Indeed, the whole presentation has the appearance one would expect if one person were independently to write the text, a second collect the graphs and a third draw up the tables, and at the price asked, one is justified in expecting better than this. As a final blow, this reviewer’s copy was defective: one whole page was missing and in its place was printed a duplicate copy of another. Clearly this expensive book is going to have a very limited sale and one cannot consider it good value for money, but if one’s work involves frequent access to tables of the properties of hydrogen, and investigators into the so-called “ hydrogen economy ” might fit into this category, then these tables will be as invaluable as they are unique.G. SAVILLE Received 5th October, 1977 Chemistry and Physics of Solid Surfaces. Ed. RALPH VANSELOW and S. Y. YONG. (CRC Press, Cleveland, Ohio, U.S.A., 1977). Pp. xi+ 386. Price $20.80. This book contains a set of review articles of lectures delivered at the second (biennial) Inter- national Summer Institute in Surface Science, 1975, University of Winsconsin, Milwaukee. The aim is to provide a forum to discuss and evaluate the latest developments by leading research workers. An outstanding contribution by (the late) Erwin W.Miiller on all aspects of ion microscopy is accompanied by four articles on surface analysis by electron and ion beams and also photoemission and magnetic resonance techniques; there are theoretical papers on the quantum physics and chemistry of surfaces, on field-emission energy distribution of electrons from clean metals, and a survey of modern chemisorption theory; various aspects of physisorption, surface (and bulk) diffusion of metal atoms, adsorption and crystal growth, and molecular beam epitaxy, are critically examined in other reviews. Finally, technological applications concerned with surface effects in the electronic industry and in thermonuclear fission, together with the interaction of gases with solid surfaces in catalysis, are the subject of three other articles. Most of the writers are foremost scientists attached to American research establishments or universities, but four reviews by well-known English, French and German specialists are also included. The reviewer was present at both the 1973 and 1977 ISISS meetings and can commend the excellence of the contributions and the vitality of the Discussion (unfortunately not included in the printed volume), and would recommend the present volume to graduates and mature postgraduates pursuing advanced courses and research in surface chemistry concerned with the gas-solid interface. UnhappiIy the reviewer’s copy had the unique feature that the binding was upside down and back to front ! F. C . TOMPKINS Received 30th November, 1977 2581