The President's Address . By E. M. Nelson . 
137 
Lines. 
17 L x 
L x ^ L D2 
L x^ L d 2 
[ 38-2 (1^1^) + -12 [« 
Bd 2 “ Be 
B 
2-47446 
•0242177 
1-391342 
1-0923 
C 
.. 
•0174060 
.. 
. . 
E 
3-22550 
•0199612 
1-146800 
•7788 
F 
3-49686 
•0359237 
2-063869 
2-2269 
G' 
3-91615 
•0605876 
3-480845 
5-9265 
4-28360 
•0822026 
4-722659 
10-6285 
(N - 17 La;) 2 
Name of Glass. 
B 
E 
F 
G' 
Hi 
Hard crown 
3089 
3006 
2976 
2931 
2891 
Soft crown 
2766 
2687 
2659 
2616 
2579 
Extra light flint ,, 
1919 
| 1854 
1830 
1795 
1764 
Light flint 
1480 
| 1422 
1402 
1370 
1344 
Dense flint 
1127 
i 1077 
1059 
1032 
1008 
Extra dense flint 
979-2 
932-8 
916-3 
891-1 
869-3 
Double extra dense flint .. 
763-8 
722-8 I 
708-3 ! 
685-7 
667-1 
Name of Glass. 
Y 
10 
Y 
. 
B 
E 
F 
G* 
Hj 
Hard crown .. 
•0000354 
•0002591 
•0007483 
•0020220 
•0036764 
Soft crown 
•0000395 
•0002898 
•0008375 
•0022655 
•0041212 
Extra light flint 
•0000569 
•0004201 
•0012169 
•0033017 
•0060252 
Light flint 
•0000738 
•0005477 
•0015884 
•0043259 
•0079081 
Dense flint 
•0000969 
•0007231 
•0021028 
•0057427 
•0105441 
Extra dense flint .. 
•0001115 
•0008349 
•0024303 
•0066508 
•0122265 
Double extra dense! 
flint j 
•0001430 
•0010775 
•0031440 
•0086430 
1 
•0159324 
1899 L 
