64 The American Geologist. July, 1892 
Cnqirocasisitteritc: A new mincral.^TTans. A. l.M. E. Feb. 1802). Mk. 
Titus Meke describes an apparently new tin mineral, which he discov- 
ered at the Etta mine, Black Hills, S. Dak. He gives the formula as 4 
SnOg -f Cu, Sn (H 0)e, containing Sn 60 p. c, HgO 8 p. c. Hardness 3, 
Sp. Gr. 5. Gives Sn and Cu reactions with soda. Dissolves in acids 
with separation of Sn O^. The author advances the opinion that the an- 
cients may have used this mineral, being of comparatively easy reduc- 
tion, in the manufacture of their bronze. 
Bohemian Garnets : Mr. George F. Kunz (Trans. A. I. M. E. Feb. 1892) 
gives the results of his visit to the garnet district of Bohemia, situated 
sixty kilometers northwest of Prague. The region is one of alluvium 
and diluvium resting upon the Cretaceous (Plilner-kalk). Phonolite and 
basalt penetrate the strata. The garnets, which are of the pyrope va- 
riety, are found loose in the soil, in the diluvium, and embedded in the 
serpentine. The lower layer of the strata is cut away, the upper ones 
being thrown down, after which the stones are separated with water. A 
quantity of vertebrate remains have been found in the diluvium by Dr. 
Parek. They are exhibited at Trebnitz, and comprise Elephas, lildnoce- 
ros, AnteloiJus, Rangifer, Cei-vus, Equus, Bos, Ursus and Siis. From a 
financial point of view, Mr. Kunz mentions the fact that in 1890 these 
" diggings " produced uncut garnets to the value of 80,000 guilders. The 
average daily pay of each worker is about 38 cents. 
Eleolite-Syenite of Litchfield. Maine, and Haices^ IIornhlende-t>yenitefiom 
Red Hill, New Hampshire. By W. S. Bayley. Bulletin, G. S. A., vol. iii, 
pp. 231-252, with a map and microscopic sections; June 4, 1892. Two 
varieties of eleolite-syenite are described in this paper, one of which 
the author names litchfi.ddite, from the township of Maine in whicli it is 
found. The second, which is a more nearly normal variety, comes from 
Red hill in Moultonboro, N. H., near the northwest end of lake Win- 
nipesaukee. 
The System of Mineralogy of James Dmglit Dana, 1837-1868. — Descriptive 
Mineralogy. Sixth edition, by Edward Salisbury Dana. New York; 
I. Wiley & Sons, 1892, pp. 1134 + 53, figs. 1400. 
More than a score of years have passed since Prof. Dana, the elder, 
issued his fifth and last edition of his system of mineralogy. We are 
now glad to welcome this new edition, for the advance in this science, 
even in the past ten years, has been remarkable; still, his system in this 
country has not been abandoned. Besides many new additions, other 
changes of much importance- have been incorporated in this sixth edi- 
tion. In the mathematical portion, the angles of the various species 
constitute an important feature. Many of these angles have been re- 
calculated and are now published in new form. Many new chemical 
analyses are given, adding much to the value of this great work. 
It is evident that professor Dana does not believe in an imnecessary 
increase in new species, aud it is also evident that his judgment in this 
respect is correct, for there are too many workers who are ready, at the 
least pretext, to create new species. This undoubtedly has arisen from 
