520 The American Naturalist. [June, 
SiO,  Fe,0,. FeO MnO MgO Ign Total 
59.72 8.67 64 26.42 4.13 = 99.58 
corresponding to H, (Mg Fe), (SiO,),. 
A pink vitreous zoisite found at the Flat Rock Mine, Mitchell Co., 
N. C., associated with monazite and allanite, has been analyzed by 
Eakins.” Its composition is: 
SiO, AlO, FeO, MnO CaO H,O Total 
38.98 31.02 4.15 .23 23.80 2.03 — 100.21 
Specimens of cacozenite from six localities have been examined opti- 
cally by Luquer™. All the crystals show parallel èxtinction, and a 
few of the larger ones appear pleochroic in orange and light yellow ` 
tints. From a few measurements the approximate axial ratio 1: .75 
was calculated. 
The heulandite” from McDowells quarry, Upper Montclair, N. J., 
crystallizes in forms agreeing essentially with those of crystals from 
Baltimore. 
The material of the pale green crystals of muscovite from the dolom- 
ite of King’s Bridge, N. Y., is a mica of the first order. Its appar- 
ent axial angle is 2E = 62° 11’, 2E = 60° 37. 
Mineral Syntheses.—The ferrous bye-products of aniline facto- 
ries at Laar, near Ruhort, Westphalia, when dumped upon the ground 
to dry, are so rapidly oxidized that the heaps soon become too hot to 
handle. The material hardens and assumes a metallic lustre On 
the walls of cavities within it erystals form whose habit is that of 
hematite but whose composition indicates an admixture of hematite 
with magnetite. 
Upon heating to 1200° in a graphite crucible for several hours, ie 
of titanic iron and two and a half parts of pyrite, Michel’ 
obtained a crystalline mass with the properties of pyrrhotite. This ” 
filled with vacuoles on whose walls are implanted tiny crystals of rutile 
with the characteristics of the natural mineral. 
Monticellite in well developed acicular crystals is reported by von 
*Amer. Jour. Sci., 1893, XLVI, p. 154. 
2Tb., 1893, XLVI, p. 154; 
“A, J. Moses: School of Mines Quart., XIV, p. 326, . 
*8Zeits. d. deutsch. geol. Ges., XLV, p. 63. 
*Bull. Soc. Franc. d. Min., XVI, p. 37. 
