r>44 SCIENTIFIC RECORD FOR 1884. 



iiiirt it is well that these, his most important papers (numbering lu'iuly 

 ouo Imiulrod), should be put in permanent form. The volume con 

 tains also biographical sketches by Dr. Marvin, Dr. Michel, and by the 

 late Professor Silliman. 



Of the works devoted to special departments of mineralogy the 

 Trait6 de Cristallographie of Professor Mallard, of the Ecole des ^Lines 

 in Paris, must be mentioned first. The first volume of this most valu- 

 able work was issued in 1870, and the second has followed during the 

 past year. The two volumes embrace upward of a thousand pages, and 

 an atlas with numerous plates accompanies them. It is the most ex- 

 haustive treatise upon crystallography and physical mineralogy which 

 has been i)ublished in many years, and covers some branches of the sub- 

 ject more fully than has ever been done before. Dr. Aristides Brezina, 

 of Vienna, has published the first part of a work entitled Krystallo- 

 graphlsche Untersuchnngen an homologcn und isome>cn lieihcn, a memoir 

 which has received the Baumgartner prize from the Vienna Academy. 

 Thii? part is devoted to a discussion of the methods of observation, 

 measurement of crystals, &c., and also the methods of calculation. 

 These topics are discussed with almost an excess of fullness of detail. 

 Dr. Eugen Hussak, of Graz, has issued a work entitled AnleUung zum 

 Besiimmen der gestelnhUdenden Mineralien, which promises to be of value 

 to those who are especially interested in the application of mineralogy 

 to i)etrograi)hy. The excellent tables for the determination of minerals 

 prepared by von Kobell, and of which 11 editions were issued before 

 the death of the author, have been revised by K. Oebbeke, and a 12th 

 edition published, with the additions Avhich the rapid development of the 

 science has made necessary. 



The Encyclopedic Chimiqnc^ published at Paris under the direction of 

 M. Fr^mv, contains two volumes which are interesting to the mineral- 

 ogist. The first of these is by L. Bourgeois, on the artificial production 

 ot minerals. Thisis a subjectto which French chemistshavemade impor- 

 tant contributions and upon which we already have an excelleut French 

 work (1882) by M^M. Fouque and Levy. This new volume is a valuable 

 contribution, giving with unusual fullness the methods employed in rhe 

 synthesis of minerals, with figures of the apparatus employed, and then 

 the special results obtained in the case of the ditferent mineral species. 

 Another volume of this encyclopedia, by M. Meunier. is devoted to the 

 subject of meteorites. This is a large volume, profusely illustrated, and 

 covering the whole subject very thoroughly. 



A secoiul i)art has been published of the work, by Tschermak, meu- 

 ticnied in the last volume of this report, devoted to the illustration of the 

 microscopic structure of meteorites. This part contains eight plates 

 devoted to olivine, bronzite, augite,and i)lagioclase, &c. They show most 

 satisfactorily the peculiar radiated structure which characterizes these 

 minerals when forming the spherical graiui> so common in the chou- 

 dritic varietv of meteorites. 



