414 Scientific Intelligence. 



pliate of lime, of its occurrence in different geological horizons 

 and of its increasing importance in agriculture. Dr. Penrose's 

 paper is intended to show in a condensed form the mode of occur- 

 rence and the theories as to the origin of phosphate deposits with 

 the object, not only of advancing the scientific study of this 

 interesting subject, but also to facilitate the search for deposits of 

 the different kinds of phosphatic minerals. The various deposits 

 are first classified as Mineral Phosphates and Rock Phosphates. 

 These headings are again divided into other sub-classes to include 

 the various forms of apatite, phosphorite, nodular phosphates, 

 phosphatic limestones, guano and bone beds. *V Under mineral 

 phosphates he begins with an extended account of Canadian apa- 

 tite and gives numerous diagrams, illustrating the mode of occur- 

 rence of the mineral ; then follow descriptions of the apatites of 

 Norway and Spain, and the phosphorites of Nassau, Southwestern 

 France and Spain, with several illustrations. Under rock phos- 

 phates are described the celebrated South Carolina phosphate 

 deposits, those of North Carolina, Alabama, Wales, England, 

 France, Belgium, Russia and other places. Then comes a de- 

 scription of the guanos of the coasts of South America, Africa, 

 Arabia, Australia and other places, as well as of the islands of the 

 Pacific Ocean, the West Indies and the Gulf of California, with a 

 notice of the bat guanos of America and Europe and the local 

 deposits of bone beds. 



The article ends with an extended bibliography on phosphates. 

 The work contains many illustrations, maps and analyses. 



R. T. HILL. 



9. On the Fulgurites of Mt. Viso; F. Rutley, F.G.S. — Mt. Viso 

 is 12,680 feet in height. The fulgurites described by Mr. Rutley 

 have a surface ploughed out by the lightning, with curved and 

 branching semi-cylindrical furrows from £ to -£% of an inch in 

 diameter. The tubes are lined with fulgurite glass, and this glass 

 proved, on careful microscope study, to contain microlites of dif- 

 ferent forms instead of being perfectly clear as in other fulgurites 

 studied by the author. The rock is a glaucophane schist. 



10. Scheelite from Idaho. — Tungstate of lime occurs, massive, 

 in an auriferous quartz vein near the town of Murray, Idaho Ter- 

 ritory, on the western slope of the Coeur d'Alene Mountains. 



WM. P. BLAKE. 



11. Hulfstabellen zar mikrosJcopischen Miner cdbestimmung in 

 Gesteinen zusammeyigestellt von H. Rosenbtjsch. — These ad- 

 mirably arranged tables giving all the needed characters of 

 rock-making minerals will be of great service to workers in 

 petrography, supplementing in a very useful way the author's 

 large treatise. 



1 2. les Mineraux des Roches par A. Michel- Levy and A. 

 Lacroix, 334 pp. 8 vo. Paris, 1888. — Students of microscopical 

 mineralogy need not now be at a loss to find text-books, with the 

 many excellent works that have been recently placed at their 

 disposal. This new volume is one of the most original, and con- 



