r;88 SCIENTIFIC RECORD FOR 1886. 



ill its special sphere, and is essential not only to the petrograi^her but 

 also to the general mineralogist, being the production of an author who 

 is thoroughly informed of the work done by others, and at the same time 

 has himself made extensive contributions in the same direction. Under 

 the title of The Determination of Rock-forming Minerals^ has been issued 

 a translation, by E. G. Smith, of Beloit College, of Hussak's work (re- 

 l)ortfor 1884), which is thus placed in convenient form for English-read- 

 ing students. HirschwaW s catalogue of the mineral collection of the 

 Berlin University is an addition to topographical mineralogy. Hatle 

 has prepared a summary of the mineral o(;currences of Styria. In the 

 department of meteorites the catalogue of the near y uniivalled collec- 

 tion in Vienna by Brezina is interesting not only as a catalogue, but for 

 the discussion of the classification of meteorites and of various points 

 in regard to their structure and origin. 



A second report on the Mineral Resources of the United States for the 

 calendar years 1883, 1884, has been issued by the U. S. Geological Sur- 

 vey, under the same editorship as the first voIuiik- — Albert Williams, 

 ir. This volume is much larger than its predecessor and is made up 

 almost entirely of new matter. After a general sun)mary by the editor, 

 a series of chapters, prepared for the most part by different specialists, 

 are devoted to each subject, many of them treated with great fullness. 

 Thus, to the subject of coal and coke two hundred pages are given; 

 chapters on j^etroleum and natural gas follow ; then extended papers 

 on iron, gold and silver, copper, lead, zinc, mercury, and the other metals, 

 these last covering pages 246 to C61 . The remainder of the volume is 

 given to a variety ol subjects, as building materials, abrasive materials, 

 precious stones, fertilizers, mineral paints, glass materials; also salt, 

 graphite, pyrites, and so on. The whole volume contains a vast amount 

 of material of value and interest to a great variety of readers in prac- 

 tical life. 



A fifth Annual lvei)ort of the Mineralogy of Califoi^nia has been issued 

 by the State mineralogist, H, G. Hanks. It is largely devoted to an 

 account of the exhibit of California and other States at the recent Ex- 

 position in I^ew Orleans. The bulletins of the U. S. Geological Survey 

 recently issued are some of them devoted to mineralogical subjects, 

 more particularly No. 20, containing contributions to the mineralogy of 

 the Eocky Mountains, by W. Cross and W. F. Hillebraud. This is 

 largely a reprint of j>af)ers (on zeolites, cryolite, &c.) previously pub- 

 lished, but contains also some additions and emendations of the original 

 matter. Another bulletin contains a description of the secondary en- 

 largement of mineral fragments (amphibole, quartz. «&c.) in certain 

 rocks, by E.. D. Irving and C. E. Vanhise. 



CRYS'J ALLOGRAPHY AND PHYSICAL MINERALOGY. 



A crystallograpbie memoir of more than usual comprehensiveness is 

 that of Ernst Rethwisch* on the ruby silvers (Eothgiiltigerz) ; it is in 



* For references, see the list of papers on mineral species at the close of this chapter. 



