S. L. Penfield—Chemical Composition of Amblygonite. 297 
V. Paris, Maine. G.=3°-035 
i. Il. Mean. Relative number of atoms. 
PO, 4828 4835 48°31 “680 1° 
Al, 33°87 33°50 33°68 Al “654 96 
Li,O —- 9°83 9°80 982 Li 654) 94, oy 
Na,O 43 24 34 Na ‘010 
e 03 me "03 
| 4°96 4°82 4:89 OH es 
F 482 4829 482 F fat cds cee 
: 101°89 
O equivalent of F 2°03 
99°86 
Ni: aerthet Maine, variety B. G.=3°032. 
; ean. Relative number of atoms. 
P.O, a 44 47°44 47:44 P ‘668 1° 
Al,O, | 33°79 34°01 33°90 Al -658 “98 
Li,O 9°24 924 Li 616) p59 .95 
NaO oie 66 66 Na ‘022 
: 5°00 510 5°05 OH‘561), 5 
F 553° 688 4b 087 Hess Fath 
aos 101°74 
O equivalent of F 2°29 
99°45 
sie oe Connecticut. G.—=3°032. 
Mean. Relative number of atoms. 
re. 46: 80 iat 48°30 P ‘686 1: 
set 3426 34:26 Al “665 ‘97 
1, 9°69 9:90 930 Li °653 
Na,O 15 “24 19 Na 006 3 ¢ 859 see 
Fe.0, 29 "29 "29 
Mn,O,  -10 "10 10 
H,0 5°93 5°90 591 OH et 750 109 
F 1°75 1°75 175° CF 
101710 
O equivalent of F “74 
¥ 100°36 
e VII. Montebras, France, variety B. G.=3°007. 
Mean. Relative number of atoms. 
P.O, ... 48°31... 49°38. . 4834. PB 681 1 
Al.O, 33-78 3838. 33°55. Al “651 "96 
LiO 953 950 952 Li 
NaO 34 ‘33 33 Na 010/°654 96 
CaO 40 30 Ca “0 
HO 661 661 £661  £QOH-734 t see Ars 
¥ 1°76 1°74 75 *-F 
100°45 
O equivalent of F “Th 
