S. L. Penfield—Occurrence of Alkalies in Beryl. 29 
ing enough pure and clear material for the analysis. It is 
interesting in showing that the beryl contains much more 
um than the lepidolite in which it is imbedded. 
II. From Norway, Maine. The material was milk-white, 
possession showing no crystal faces. It was collected by Mr. 
N.H. Perry of South Paris, Me., and sent to Professor George 
J. Brush, who kindly gave me the material for analysis. 
IIL From’ Branchville, Conn. The material was taken from 
a fragment of a large orystal of a beautiful pale, sea-green 
color, much resembling a piece of slightly colored quartz. 
IV. From Amelia Court House, Virginia. ‘The material was 
taken from a large milk-white crystal in the collection of Pro- 
fessor Brush. 
- V. From Royalston, Mass. Froma bluish green crystal, from 
which pure transparent material could readily be obtained. 
VI. From Stoneham, Maine. The material was perfectly 
transparent and taken from fragments of a erystal of a pale 
green color best fit by Mr. George F. Kunz, of New York. 
VII. Fro duntschilon, Siberia. The transparent a 
of a pale see color were taken from a specimen in the 
tion of Professor George J. Brush. The specimen was sede to 
‘him by Mr. J. von Hichwald, who collected it at the locality. 
L Il. III. IV. Vi VI. VIL. 
bas in Norway, erence tenet cage Co., ae 8 is Bae agar Aayntschiton, 
Me. Con Siberi: 
Sid, “ 19 64°29 er ase so kes 661" 
Al,Os 18:92 18°89 20°13 20°80 19°83 20°25 20°39 
Cs,0 2°92 66 ag ae EIS L alte pa rae male 
Na,O 1°82 1°39 1°45 46 51 oe. 24 
Li,O E47 "84 s&s “13 05 trace trace 
Ign 2°33 2°44 2°69 2°19 2°04 2°08 114 
CaO °35 MgO °34 
100°45 100°53 100°53 100-23 100°45 100°14 100°13 
Sp. gr. —— 2°744 2-732 2°685 2°11 2°708 2676 
Below I have given the “rw Scary by dividing the 
percentages by the molec lad weights of the constituents ar- 
ranged in the same order as the ayes I have regarded the 
alkalies as replacing the beryllium in all cases, and they are in- 
cluded with the beryllium in protoxides. 
Ratio E AT, III, IV. ae L VAL: 3 
SiO, 10350 10715 10790 10855 1:0857 10866 11028 — 
Al,Os 1837 "1834 1954 *2019 "1952 “1966 "1980 
9 a 
xide °4995 4845 4653 - °4597 4735 “4755 “4735. 
‘Water 1294 "1355 1494 “121% 1133 1155 = °0633 
