274 Scientific Intelligence. 
Tourmaline.—A reply to Rammelsberg on the composition of tour- 
maline by Hermann, is published in the Jour. f. prakt. Chem. liii, p. 
Emerald of New Grenada.—M. B. Lewy has examined the locality 
lanthanum. In the same deposits, M. Lewy collected an ammonite 
peculiar to the Neocomian series. 
On the Gigantic Beryls of New Hampshire; by O. P. Husparp. 
This Jour. xiii, 264. 
On the angles of Eumanite; by J. E. Tescuremacues.—This Jour. 
xii, 117. 
On Crystals of Brookite from the Ural; 
(Verh. der Min. Ges. zu St. Pet., 1848-49). 
This paper was mentioned by us in vol. xi, p. 
28. We now add a figure from it, and give 
the angles anew. 1I:1=99° 50’ and 80° 10’, 
42 :42=134° 214’, 27 : 2% (over 11) —124° 12’; 
42 : $¢ (over P)=121° 244’; 40:42 (over P)= 
148° 394/; 
by N. von KoxscHarov, 
54’, 142° 21’; octahedron 4, 126° 12’, 185° 14, 
72° 303'; 1-2, 135° 37’, 101° 3’, 95° 224; 2.8, 
124° 36’, 77° 14/, 131° 3 
A. Genth, Proc. Acad. Nat. Sci. Philad. vi, 113. sit 
Pyrochlore and Garnet of the Urals.—Koxscuarov has eng 
and figured octahedral crystals of pyrochlore (Vesh. Min. Ges. St. 3B 
odeca- 
examined by M, Hermann (J. f. pr. Chem, liii, 32.) oe beget 4 
much like those of zircon and present the faces of an ay A 
ign: nd of a square prism, o& yramidal angle © ‘a 
= i a d ‘ 1 . LS at 3 
octahedron about 124°. Lustre rather weak, somewhat greasy, 
ing to adamantine. Lustre of surface of fracture weak and g 
Color nut-brown. eh: Composition :— 
Si Zr 
: 31:87 59°82 311 
tos Oxygen. 1650. ©. = 1572. O68. 
This gives the formula, 3% Si + oT. 
& 
% 
