

732 Notices respecting New Books. 



appeared in 1902. Lest any reader of this review should be misled 

 into supposing that the German version of this work is a mere 

 translation, we hasten to assure him that such is by no means 

 the case, as by reason of numerous additions which have brought 

 it up to date, and important original contributions by the trans- 

 lator, it has- become practically a new treatise on the subject. 



The investigations connected with the recently discovered, 

 gases — argon, helium, neon, crypton, and xenon — have necessitated 

 the development of much more refined and elaborate methods than 

 any of those formerly in use. The details of many of these 

 methods are not always to be found in the original papers which 

 contain the results of experimental investigations, but they will be 

 found clearly described in the book under review. 



The opening chapters deal with the fundamental laws of gases, 

 the construction of mercurial pumps, the handling of gases, their 

 collection and storage, the preparation of gases in a state of purity, 

 pressure and volume measurements, the calibration of vessels and 

 tubes, and gas analysis. The next two chapters deal with- the 

 composition of the atmosphere and the gases of the helium group. 

 Then follows an account of density determinations, of the relations 

 connecting temperature, pressure, and volume over narrow and 

 wdde ranges of variation, the liquefaction of gases and the methods 

 of handling them, vapour pressures and the critical constants, the 

 solubility of gases in liquids, specific heats and heats of vaporization, 

 effusion, transpiration and diffusion, refractive indices, and spectrum 

 analysis. A useful appendix contains an account of methods for 

 producing and maintaining constant known temperatures. 



The author and translator are to be congratulated on having 

 produced a work which is not only of very great value to the 

 specialist in this subject, but which will prove of interest- to a 

 much wider circle of readers — for every chemist and physicist will 

 derive solid benefit from a careful study of this unique work. 



Vier- unci Funfsteilige Logaritlimentafeln nebst einigen Physikalisclien 



Konstanten. Vieweg und Sohn, Braunschweig. 

 This clearly printed book of tables contains the usual four-figure 

 logarithms on two pages, followed by 18 pages of five-figure 

 logarithms with proportional parts alongside. Two brief tables 

 of natural sines and cosines, tangents and cotangents for complete 

 degrees only, a few analytical expansions, and condensed tables of 

 various physical constants fill three other pages. The book appeals 

 especially to the needs of workers in physical laboratories. 



Fiinfzehnter Bericht der Katunuissenschaftlichen Gesellscliaft zu 

 Chemnitz, umfassend die Zeit vom 22. Oktober 1899 bis zum 

 30. September 1903. Mit 3 Tafeln und 7 Figuren im Texte. 

 Chemnitz : Carl Brunner. 1904. Pp. cxxiv+186. 

 In addition to the List of Members and other official information, 

 this volume contains a number of papers, mainly on botanical sub- 

 jects, and an interesting article on k - Our Calendar'' by Professor 

 O. Midler. 



