Silex, 
Alumina, 
. 
Magnesia, 
Lime, 
Potash, 
Soda, : 
Loss by ignition, 
Silex, 
Alumina, 
Magnesia, 
Lime, 
Potash, 4 
S101 ba Ags ae Re a 
Loss by ignition, 
Silex, 
Alumina, 
Magnesia, 
Lime, 
Potash, 
Soda, : 
Loss by ignition, 
" LOUGH DAN. 
Sp. gr. = 2°453. 
Per Cent. Atomic Quotients. 
65:05 1:436 
17-72 0°345 
. “Brace, 0-000 
0°23 0-008 
13-42 o2ss (938! 
2-75 0-088 
0°36 
99°53 
Sp. gr. =2°559. 
GLENMACANASS. 
Per Cent. Atomic Quotients. 
64:19 1-417 
18°39 0°358 
0°34 0017 
0:70 0:025 
11°39 0-242 (9979 
2°95 0:095 
0°58 
98°54 
Sp. gr. = 2°553. 
GLENDALOUGH. 
Per Cent. Atomic Quotients. 
63°60 oa e404 5. 
18°84 0°366 
0-40 0:020 } 
. Trace, 0-000 . 0-385 
14°33 0-305 | 
1-92 0-060 4 
0:60 
99°69 
Proportionals, 
4:16 
1:00 
1:10 
Proportionals, 
3°96 
1-00 
1:05 
Proportionals. 
3°83 
1:00 
1:05 
