480 Scientific Intelligence. 



Ostwald, has not kept pace with the rapid strides which have 

 been made in physics in the last decade, and since the excellent 

 text-books of W. Nernst and J. H. van't Hoff are primarily 

 restricted to the chemical aspect of the , subject, Jellinek has 

 undertaken the enormous task of writing a text-book (not a 

 " Handbuch ") on physical chemistry which is intended to cover 

 the entire field and to lay due emphasis on the physical side of 

 the appertaining phenomena. In pursuance of this high ideal 

 the author proposes to present the subject in four volumes,, 

 namely " 1. Buch (Bd. I and II). Die Lehre von den Aggre- 

 gatzustanden (reine Stoffe und verdtinnte Losungen der Nicht- 

 elektrolyte) " ; "2. Buch (Bd. III). Die Lehre vora Aufbau der 

 Materie (YVeltather, Elektronen, Ionen, Atome und Molekule)" ; 

 "3. Buch (Bd. IV). Die Lehre von den Umwandlungen der 

 Materie (chemische Statik und Kinetik) " ; " 4. Buch (Bd. IV). 

 Die Lehre von den Umwandlungen der Energie (Mechanochemie, 

 Thermochemie, Magnetochemie, Elektrochemie, Photochemie)". 



Therefore the volume before us is the first Part of the first 

 Book. It is stated in the preface that the manuscript of the 

 second Part of Book 1 is finished and that the work may be 

 expected from the press in the fall of this year. A general idea 

 of the scope of the present volume may be obtained from the 

 following facts. Pages 13 to 159 treat of the fundamental prin- 

 ciples of physical chemistry. The gaseous state comprises pages 

 160 to 431, and the passage from the gaseous to the liquid state 

 has pages 432 to 468 devoted to it. The rest of the text proper, 

 as far as page 711, relates to the liquid state. Fortunately the 

 author does not avoid mathematics, such as the more elementary 

 parts of the differential and integral calculus and of the theory of 

 probability. From the physical point of view the work is fully 

 up to date and involves Planck's "quanta", etc. Also, great 

 pains have been taken by the author, by his brother, and hj his 

 wife to make the technical side of the book as perfect and com- 

 plete as possible. For example, twenty pages are devoted to the 

 bibliography and literature of the subject, and to abbreviations 

 and symbols. The volume ends with a list of typographical 

 errors and supplementary comments, and with author and subject 

 indices. The text merits the attention of physicists as well as of 

 physical chemists and, if the author succeeds in maintaining the 

 very high standard maintained throughout the first volume, the 

 work will doubtless become the standard text-book on the sub- 

 ject, h. s. TJ. 



8. Complex Ions in Aqueous Solutions ; by Arthur Jaqxjks. 

 Pp. vi, 151. London, 1914 (Longmans, Green & Co.). — "The 

 chief aim of the book is to give some account of the more 

 important experimental work in this subject, and no apology is 

 offered for the absence of theories of valenc}'." The introduc- 

 tory chapter is followed by five chapters which deal respectively 

 with the chemical, ionic migration, distribution, solubility, and 

 electrical potential methods for the identification and investiga- 



