Mineralogy and Geology. 125 
enstatite. From his results he —— that serpentine has been a com- 
mon source of chrysolite. The memoir merits close 
eol. and Mining in the College of “eegesiete 32 pp. 8v0. Mareh, 
1866. Sacramento.—Prof. Blake has done a good service to mineralogy 
in this catalogue of California and adie. ~wousknarieed mineral locali- 
ties. e pamphlet contains, besides a mention of the localities, notices 
of the associations and characters of some of the species, and a list of 
private and public cabinets in California. It closes with a chapter of 
four pages containing Notes on the Geographical distribution and Geology 
of the Precious Metals and Valuable Minerals of the Pacific Slope of 
the oe States, some points in which Prof. Brewer has criticized at 
ange 
15. De ap erin dee Schweiz, yon Dr. Apotr Kenneortr. 460 
16mo, with 78 woodcuts. Leipzig, 1866 (Wilhelm Engelmann).— 
Kenngott i is alias thorough in his mineralogical works. This Mineral- 
ogy of the Alps contains not only notices of the localities and the asso- 
ciations of the ice but also extended observations on pecu pee 
presented by many of the minerals at their several localities, with som 
new cepasiceteis determinations. The work is therefore much more 
than a mere topographical sevorey: It is full of original observations, 
16. Motes on some members of the rage’ family by Isaac Lea. 
66).— 
give the na e Lennili te sf a greenish orthoclase ‘pane without cleav- 
age,” from an nni, Delaware Co.; Delawareite, to accompanying speci- 
mens, pearly, and distingtly cleavable ; and Cassinite. to a dull bluish 
of sunstone and m stone are mention ad, and some particulars respect- 
ing the microscopic crystals of different feldspars. No conclusions are 
arrived at in regard to the nature of the erystals. 
17. Vorlesungen iiber Mineralogie ; von N. von | gaa rag 25 Berg- 
Ingenieur, Ist vol., 344 pp. 4to. St. Petersburg, 18 5. (A. Jacobson.) 
is work is a German translation by its au sl from the Russian. 
Von Kokscharow has lon been laboring with great success, and with 
its erystallograp ic department. The volume just now e first 
rt of an admi series of lessons in general mine kes 
up crystallography, illustrates the subject with numerous excellent 
s great work on Russian mineralogy, a rough- 
out is both simple and thorough in its explanations. e cha 
