1890.] Mineralogy and Petrography. 855 
the Kalterborn Mine, near Eiserfeld, Siegen.“ It is in the form of 
blood red or reddish-violet aggregates lining cavities in an iron ore. 
It is transparent, and has a hardness of 3.75, and a density of 2.76, 
In the glass tube it becomes yellow and opaque and loses water. peed 
solves in hydrochloric acid, but is almost insoluble in nitric acid. 
analysis gave Fe,O,— 44.30 ; P,O,— 38.85 ; H,O = 17.26, aaa 
ing nearly to 2Fe,O, P,O,+8H, 0, which is the formula for strengite. 
The new mineral differs from strengite in containing about two per 
cent. less water, and in losing all of this in onestage. Phosphosiderite 
is orthorhombic, with a:4:¢ —.5330:1:.8772. The cleavage is par- 
allel to oo P 3, which is the predominant form. Prismatic forms are 
also largely developed. Twins, with Poo the twinning plane, are met 
with, The mineral is optically positive, with o» P & the axial plane 
and c the acute bisectrix, 2 Vg, — 62?4' and p> v^. Pleochroism is 
a= pale rose, ? = carmine, ¢ = colorless, 
Miscellaneous.— The U, S. National Museum has just published 
two pamphlets of some interest. One is by Mr. Kunz," and contains 
a readable account of the gems in the possession of the institution. 
The second is of more special interest to mineralogists. It is a com- 
plete catalogue of mineral names, with their synonyms in French, Ger- 
man, and other languages. The volume is by Dr. Egleston,” of 
Columbia. It is intended to serve as an aid to those who arrange and 
keep in order = icai val a minerals, a purpose that it 
will surely The t of volume second of 
the Report of Mes Geological ee of New Jersey!® contains 
a full list of the minerals found in that State. The well-known 
instrument maker, Fuess,!? has recently given very full and clear de- 
scriptions of some petrographical microscopes. manufactured by him- 
self after suggestions offered by practical mineralogists and petro- 
graphers, and of some newly-constructed apparatus for use with these. 
The most novel of the latter are an axial angle apparatus and a gonio- 
meter attachable to the stage of the microscopes. 
13 Bruhus and Busz: Zeits. f. Kryst., XVII., 1890, p. 555. 
14 Rep. Smith. Inst., 1885-6, Pt. IL, p. 267-275 
15 Bull. U. S. Nat. Mus., No. 33, Wash., 1889 
16 Geol. Sur. of N. J. Rep. of State Geol., Vol. II., Pt. I., Trenton, 1889. 
"Neues Jahrb. f. Min., etc., BB. VL, 1890, p. 55. 
