236 Notices respecting New Books. 
Chapters IITI., IV. and V. contain a very complete critical account 
of the experimental methods which may be employed for deter- 
mining either all three, two or one critical constants. In Chapter 
VI. are given theoretical or indirect methods of inferring the values 
ot the critical constants from certain other experimentally deter- 
mined properties of the substance. Chapter VII. contains a 
complete table of the critical constants of 165 pure substances. 
The three concluding Chapters, VITI.—X., deal with some of the 
recently alvanced views and theories regarding the relation of the 
liquid to the gaseous phase, notably those of de Heen and Traube. 
The book forms a most valuable contribution to physical litera- 
ture, and should become a standard work of reference. 
Ausgewihlte Methoden der Analytischen Chemie. Von Prof. Dr. 
A.Cuassen. Zweiter Band. Unter Mitwirkung von H. CLOBREN. 
Mit 183 Abbildungen und Zwei Spectraltafeln. Braunschweig: 
F. Vieweg und Sohn. 1903. Pp. xvi+830. 
We had recently occasion to commend to the notice of analytical 
chemists the first volume of this comprehensive treatise. The 
second volume, which follows the first after a comparatively short 
interval, fully maintains the hieh standard of excellence set up by 
its predecessor. It deals with the non-metellic elements, and 
contains a short section devoted to elementary organic analysis. 
All the more modern metheds are fully described, and the special 
forms of apparatus used are beautifully illustrated. No analytical 
chemist who is desirous of availing himself of the best of modern 
methods can afford to be without this valuable work of reference. 
Annuaire pour Tan 1904, publié par le Bureau des Longitudes. 
Avec des Notices scientifiques. Paris: Gauthier-Villars. Pp. 
(o2+-120. “Pris Vir. 50, 
In addition to the usual tables of constants, the Annuaire for the 
current year contains two specially contributed articles, one of 
which, by M. Bouquet de la Grye, deals with the results of the 
International Conference on Geodesy held at Copenhagen in 
August, 1903; while the other, by M. P. Hatte, is ‘“ An Elementary 
Explanation of the Tides.” This latter article is specially note- 
worthy, and should strongly appeal to all who can appreciate the 
beauty of a simple and elegant treatment of a highly complicated 
subject. 


‘WE regret to announce the death of Dr. Witt1am Francis, 
for many years one of the Editors of this Magazine, which took 
place on the 19th January. A short notice will appear next month. 
