Geology and Mineralogy. 411 
and () a made worthless by or before reaching a temperature 
of 1 
ie owing table contains these results under the headings 
(1), (2), (3), (4), and those also for the other kinds of stones. 
: (1) Seema (3) (4) 
Granites 700°— 800° 800°— 900 800°— 950° at or >i 1000° 
Sandstones 800°— 900° 850°-1000° 900°-1000° °-1200° 
Massive limestones 850°— 950° 900°-1000° —900°-1100° ‘agate 1200° 
Marbles 900°--1000° 950°-1000° 1000°-1200 1200° 
Conglomerates 600°— 700° 700°- 800° 800°- 900° 900°—1000° 
The granites had a specific gravity between 27600 and 2°727, 
excepting one from Stanstead, Canada, of 2°833; and immersion 
in water added to their weight, through ahsorpsicn: from 1-280th 
of their weight to 1-818th. In the case of a > — re 
2168 to 2°661, but mostly under 2-400; and the was 
l-I7th to 1-80th excepting two giving "1-240th (a feesone from 
Nova Scotia), and 1-314th (the Montrose stone, Ulster Co., N. Y.) 
For the marble, sp. gr.=2°666 to 2°848, and the abaaryacee '1-300th 
gr.=2°478 to 2°706, and absorption 1-280th to 1-480th. 
The least absorbent of the granites (its ratio of pr tate 
1-818th) was one of the most destructible by heat, and the mo 
absorbent lg P was equally destructible. The limestones Pa 
marbles are stated to change to quicklime at about 1200° 
14. Brief notices of some recently described minerals. —Brgexr- 
ITE, ccurs massive and in small isometric crystals, showing 
octahedral and dodecahedral planes. Specific gravity 7° 273. 
Luster metallic, on the crystals brilliant. Color light to dark- 
gray. An analysis gave (after de spate quartz) 8 14°97, Bi 20° i 2 
Pb 64: 23, Cu 1°70=101°49, This ¢ rresponds nearly to the fo 
ula Pb Bi S, or oPbS+ Bi, S,. Found at the Baltic Lode, eas 
Grant P, ah Park Co., Colorado, Named after Mr. H. Begeer of 
gt Described by Dr. G. Koénig.— Amer. Chem. Journ., 
vol. ii, : 
edinn orirE, Occurs in small crystals belonging ne the mono- 
clinic system, jprenhae in habit the lazulite from Georgia; the 
crystals often forming drusy surfa Hardness 3-4. Color 
dish-brown to dark hyacinth-red and streak-yellow. Luster 
Vitreous inclining to p An analysis gave P,O, 31:88, Fe,O, 
& 37=100°19, corneas to 2Fe, He,0, 
is Vv r beraunite, if not identical with it 
Found with other phosphates at the Eleonore mine near Bieber, 
also from Waldgirmes near Giessen. Named by Nies, and de- 
scribed by Eis —Jahrb, Min 
CITE is a second phosphate from the same localities as Hleo- 
norite, Te i is a glassy, apparently amorphous, min neral. Hardness 
- Specific gravity 2°83. Luster greasy to vitreous. Color 
dark-brown, streak yellow. Fracture semi-conchoidal. An anal- 
: PO, 24°47 ; 
The formula corresponds to 4Fe,P, oO, 3H. Fe,O,+27H,0, on the 
uncertain assumption that the mineral is homogeneous, —AJahrb. 
Min., 1881, i, p. 16 ref. and p. 1 
