196 Scientific Intelligence. 



The final paper is on " The Relations of Equilibrium between 

 the Carbon Dioxide of the Atmosphere and the Calcium Sul- 

 phate, Calcium Carbonate, and Calcium Bicarbo7iate of Water 

 Solutions in Contact with it" by Julius Stieglitz. The purpose 

 of the paper is to obtain a relation, if possible, between the 

 chemical composition of gypsum deposits and the carbon dioxide 

 of the atmosphere at the time of formation. The considerations 

 developed make it desirable to examine such deposits of gypsum 

 very carefully and exactly for even very small quantities of cal- 

 cium carbonate. j. b. 



2. Second Appendix to the Sixth Edition of Dana's System of 

 Mineralogy • by Edward S. Dana and William E. Ford. 

 Pp. xi, 114. New York, 1909 (John Wiley & Sons).— Ten years 

 have passed since the publication of the First Appendix to the 

 Sixth Edition of Dana's Mineralogy, and during this time a very 

 large amount has been added to the literature dealing with 

 mineral species. This second appendix, now issued, gives a con- 

 cise summary of this literature with full descriptions of all the 

 well-established new species. Of these new species there 

 are some sixty out of about two hundred new names, the 

 remainder having been given to varieties and to imperfectly 

 described minerals. The larger part of the labor on this appendix 

 has been done by Professor Ford, who took up the work, when 

 the senior editor was compelled to relinquish it, and carried it 

 through to completion. 



3. Sketch of the Mineral Resources of India ; by T. H. Hol- 

 land, Director, Geological Survey of India. Pp. xi, 86, with two 

 maps. Calcutta, 1908. — Many interesting points are brought out 

 in this summary. It is noted that the total value of mineral 

 production in India (for 1906) was £6,313,000 ; of this gold and 

 coal made up two-thirds. Other prominent products in order of 

 importance are : petroleum, manganese, salt, saltpeter and mica. 

 The value of the ruby, sapphire and spinel mined was about 

 £100,000 and of jadeite £64,400. India has now lost by foreign 

 competition the prominent place she once held in her metallurgical 

 industries, of iron, copper and brass, and chemical industries of 

 borax, niter, alum, blue vitriol, copperas, etc. The rapid spread 

 of railways, however, gives reason to hope that the increased 

 local demand may restore something of the ancient prosperity in 

 these lines. 



4. Igneous Rocks : Composition, Texture and Classification, 

 Description and Occurrence j by Joseph P. Iddings. In two 

 volumes. Volume I. Pp. xi ? 464, 3 plates. New York, 1909 

 (John Wiley & Sons). — This important work has recently been 

 issued ; a notice is deferred until a later number. 



Obituary. 



Professor Simon Newcomb, the astronomer, died in Washington 

 on July 11 in his seventy-fifth year. A notice is deferred until a 

 later number. 



