166 Scientific Intelligence. 



The specimen was found in a fissure vein in quartzite rock, 100 

 feet below the surface. As all the lead of the surrounding 

 country exists as galenite, the conclusion seems to follow that the 

 mineral is a direct alteration from the sulphide. 



Laboratory of The Globe Smelting and Refining Co., July 18, 1889. 



6. The Minerals of New South Wales, etc., by A. Liver- 

 sidge, M.A., F.R.S. 326 pp. Svo. London, 1888, (Tritbner & 

 Co.). — A thorough, well digested work on local mineralogy such 

 as Professor Liversidge has given us is of great value to the 

 mineralogical student. The author has already published two 

 earlier memoirs on this subject, but this third edition has a much 

 wider scope and constitutes an independent work. The subjects 

 of the metals, as gold, silver, copper, tin, are treated with 

 especial fullness and have more than a local interest. The 

 author has also included the results of his own original work on 

 many of the species. A large and well executed colored mineral 

 map forms the frontispiece to this unusually handsome volume. 



V. Eighth Annual B,eport of the State Mineralogist of Cali- 

 fornia, for the year ending October 1, 1888. William Irelan, 

 Jr., State Mineralogist. 948 pp. 8vo. Sacramento, 1888. — The 

 present issue is the most extended of the series, and gives a detailed 

 account of the mineral resources of the State, arranged according 

 to counties. The number of subjects noticed will be appreciated 

 from the fact that an index of 50 pages is needed to record the 

 names of the different mines, mills, etc., which are mentioned in 

 the volume. 



III. Botany and Zoology. 



1. Beitrdge zur Kenntniss der Oxidationsvorgdnge in leboiden 

 Zellen ; by Professor Pfeffer, of Leipzig, pp. 141, (from the 

 fifteenth vol. of the Abhandl. der math-phys. Classe der Kouigl. 

 Sachsischen Gesellschaft der Wissenschaften. No. V. 1889.) — 

 Professor Pfeffer presents the results of a systematic investiga- 

 tion regarding the action on vegetable cells, of peroxide of 

 hydrogen. The experiments are characterized by his usual thor- 

 oughness and breadth of examination. He is led to believe that 

 neither the substance referred to, nor any similar substance furnish- 

 ing active oxygen, arises iu living cells. The same is true of cell- 

 sap. Hence the processes of oxidation in the living cell are 

 effected in some other way than by simple imbibition into the 

 protoplasm. g. l. g. 



2. Biologia Oentrali- Americana, or Contributions to the 

 knowledge of the Fauna and Flora of Mexico and Central Amer- 

 ica. Edited by F. Ducane Godman and Osbert Salvin. Botany. 

 Introduction (Vol. I, pp. ix-lxi) by W. B. Hemslet. Commen- 

 tary on the Introduction and Appendix, (Vol. I, pp. lxii-lxviii) by 

 Sir J. D. Hooker, and Appendix (Vol. IV, pp. 117-332) by W. B. 

 Hemsley, 1888. — Mr. Hemsley's important addition to existing 

 knowledge regarding Geographical Botany possesses a high de- 

 gree of interest to American students. It contains analyses of 



