1 66 SCIENCE PROGRESS 



The style adopted by the authors is somewhat unusual and might be called 

 synoptic or telegraphic, and in some cases only the bare outline of the subject 

 under treatment is furnished. Such a fault is permissible when very full references 

 are given for further information and when it is desired to keep the individual 

 manuals within a reasonable compass as regards size and price, as is here the case. 



We regard the manuals as a very satisfactory groundwork, which, if kept up 



to date by the periodical issue of new editions, ought to prove beneficial to all 



engaged in these branches of technology. 



C. S. G. 



The Molecular Volumes of Liquid Chemical Compounds from the Point of 

 View of Kopp. By Gervase Le Bas, B.Sc, Lond. [Pp. xii + 275, with 

 9 diagrams.] (London : Longmans, Green & Co., 191 5. Price ys.6d. net.) 



THIS volume is one of a series of monographs on inorganic and physical chemistry 

 edited by Prof. Findlay. It constitutes the first attempt in English to collect and 

 systematise in one compass the known data on molecular volumes. The issue of 

 such a volume as this will ensure for the author's subject more attention from 

 advanced students and workers in physical chemistry than would be the case if 

 reference had still to be made solely to original papers. The gain to physical 

 chemistry by thus bringing to general knowledge an as yet little used and not 

 highly developed method of attack is considerable. 



The author takes first in sequence molecular volumes at the melting point and 

 at the boiling point, followed by the volumes of halogen, oxygen, sulphur, nitrogen 

 and phosphorus compounds, together with those of a few other non-metallic 

 derivatives and a few metals. The volume concludes with a theoretical discussion 

 of the subject, (a) as regards the " additive " principle, (&) the constitutive in- 

 fluences, and (c) relationships to other known physical properties. 



The text contains a few spelling errors which will need correction in a second 



edition, and the author has made a mistake in not preparing any index of contents 



to his subject matter. 



C. S. G. 



Analytical Chemistry. Based on the German text of F. P. Treadwell, Ph.D., 



Professor of Analytical Chemistry at the Polytechnic Institute of Zurich. 



Translated and revised by William T. Hall, S.B., Assistant Professor of 



Analytical Chemistry, Massachusetts Institute of Technology. Vol. I. 



Qualitative Analysis. Fourth English after the eighth German Edition. 



(Pp. xxiii + 538.) (New York : John Wiley & Sons, Inc. ; London : 



Chapman & Hall, Ltd., 1916. Price 12s. bd. net.) 

 A Text-hook of Quantitative Chemical Analysis. By Alex. Charles 



Cumming, D.Sc, F.R.S.E., and Sydney Alexander Kay, D.Sc, 



Lecturers in the University of Edinburgh. (Pp. xv + 402.) Second Edition. 



(London: Gurney & Jackson; Edinburgh: Oliver & Boyd, Tweeddale 



Court, 1916. Price 9-r. net.) 



It is a somewhat moot point as to the exact position which qualitative and 

 quantitative chemical analysis should occupy in a University Science curriculum, 

 and signs are not wanting that there is likely to be a reversal of the old idea — due 

 largely to the influence of Bunsen — that the aim and object of practical work is to 

 enable one to perform the qualitative analysis of mixtures. The tendency at 

 present is certainly to increase the importance attached to exact quantitative 



