68 Scientific Intelligence. 
17. Analysis of Be ors -green oo from Nor th 
Carolina; by F. Grentu. — The following analysis of the 
Alexander County atin "(hiddenite) was furnished 
Genth, and should have been added to the article on the er setak 
line form of the gh on page 179 of the last volume, but was 
not received in tim e presence of a small quantity of chro- 
mium shown by this analysis is interesting as bearing upon the 
question as to the cause of the color to which this variety of spod- 
umene owes its beauty : 
SiO, Al,Os Cr.05 FeO Li,O Na,O K,0 
63°95 26°58 0-18 ji 2 | 6°82 154 0°07=100°25 
Beau gravity = 3°177. 
8. ae Miiwalogieat Works—Lehrbuch der Mineralogie von 
vTs SCHERMAK, Erste Lieferung. 192 - 8Y0. Vienna, 
topics discussed, but fully so as regards the way in which old 
principles are presented. The style is clear and concise, and the 
author’s long experience as a teacher has given him an unusua al 
power in — ning difficult subjects in an intelligible and 
attractive 
Matetoles: “eur Mineralogie Russlands von N. von Kok- 
scharof. Volume viii, pp. 33-320. St. Petersburg, 1881.—The 
first. portion of volume eight of the valuable work by Professor 
Kokscharof on Russian » Mineralogy was issued about three yon 
since (this Journal, xvii, 486, 187$ The continuation, no 
species : pepe. epidote, eschynite, phosgenite, bournonite, 
greenockite, quartz, samarskite, amphibole, beryl, magnetite, py- 
ini ite i f 
erystals of various artificial compounds are also aN e me- 
moirs contained in the volumes of this series w ways be 
regarded o models of careful and accurate cystallogta she holds 
Elemen e der Min ee ee ee toe Wine 
Ny 
n 
lo 
This edition, the eleventh, has been prepared, as was the preced- 
ing (this Journal, xiv, 424, 1877), by Professor Zirkel, of Leipzig. 
The new matter added gives the more important results of min- 
eralogical investigations during the past four years. It speaks 
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