Chemistry and Physics. 559 



dex, Journal List, and Addenda. The author and the publishers 

 deserve much credit for the enormous amount of uninteresting 

 work necessitated by the compilation of the material and for the 

 very clear, appropriate, and accurate typographical composition 

 respectively. h. s. u. 



11. The Theory of Heat Radiation; by Max Planck. Trans- 

 lated from the second edition by Morton Masius. Pp. xiv, 225, 

 with 7 figures. Philadelphia, 1914 (P. Blakiston's Son & Co.). — In 

 this book Planck gives a very clear exposition of his hypothesis of 

 the "quantum of action" which has exerted a very profound influ- 

 ence on the recent developments of theoretical physics. The sub- 

 ject matter is divided into five Parts which have the following- 

 headings: I "Fundamental Facts and Definitions," II "Deductions 

 from Electrodynamics and Thermodynamics," III "Entropy and 

 Probability," IV "A System of Oscillators in a Stationary Field 

 of Radiation," and V "Irreversible Radiation Processes." 



The translator has increased the usefulness of the volume by 

 adding several foot-notes, an appendix on deductions from Stir- 

 ling's formula, and a commentated list of general papers which 

 treat of the application of the theory of quanta to different 

 branches of physics. English students who experience distraction 

 of attention in attempting to read the original text will undoubt- 

 edly feel very grateful to Masius for the clear and accurate trans- 

 lation which he has given. h. s. u. 



II. Geology. 



1. Virginia Geological Survey ; Thomas Leonard Wat- 

 son, Director. Bulletin JVb. VIII, Biennial Report on the Min- 

 eral Production of Virginia during the calendar years 1911 and 

 1912 ; by Thomas L. Watson. With chapters on zirconiferous 

 sandstone near Ashland, Virginia, by Thomas L. Watson and 

 Frank L. Hess, and geology of the salt and gypsum deposits of 

 Southwestern Virginia by George W. Stose. Pp. 76, 2 pis., 

 8 figs. Charlottesville, 1913. — The variety of products mined 

 and quarried in Virginia is indicated by the statistical tables, 

 which include barytes, clay, coal, copper, diatomaceous earth, 

 feldspar, gold, granite, gypsum, iron, lead, lime, limestone, man- 

 ganese, paint ores, portland cement, pyrite, rutile, salt, sandstone, 

 silver, slate, talc and zinc. The papers by Watson and Hess and 

 by Stose, included in Bulletin VIII, have been previously pub- 

 lished in substantially their present form as parts of Bulletin 530 

 of the U. S. Geological Survey. h. e. g. 



Bidletin JVo. IX, The Coal Resources and General Geol- 

 ogy of the Pound Quadrangle in Virginia : by Charles Butts. 

 Prepared in cooperation with the II. S. Geological Survey. 

 Pp. 61, 1 fig., 3 pis., map in pocket. Charlottesville, 1914. — The 

 report on the Pound Quadrangle is the first of a series of papers 

 on the Pennsylvanian coals of southwestern Virginia. In this 



