APPENDIX. 
515 
Table No. 1. 
Table for Increased Reading of Thermometer, using 0 o, 80 as the 
Result of Observations for its Error. 
Month. 
1861. 
1862. 
1863. 
1864. 
1865. 
o 
o 
o 
o 
o 
January 
— 
0143 
0-314 
0187 
0-659 
February . 
— 
157 
•328 
•501 
•673 
March .... 
0*000 
172 
•344 
•516 
•688 
April .... 
•014 
186 
•358 
•530 
*702 
May. 
•028 
•200 
•372 
•544 
•716 
June. 
. -043 
•214 
*387 
•559 
•730 
July. 
•057 
•228 
.401 
•573 
•744 
August .... 
•071 
•243 
•415 
•587 
•758 
September . . . 
*086 
•257 
•430 
•602 
•772 
October.... 
•100 
•271 
•444 
•616 
•786 
November . 
•114 
•285 
•458 
•630 
0-800 
J December . . . 
0T29 
0*300 
0-473 
0*645 
Table No. 2. 
At the elevation of 3,500 feet, 1° equals about 520 feet, from, 
which the following— 
o 
Feet. 
o 
Feet. 
o 
Feet. 
l-o . 
. . 520 
•7 . . 
, . 364 
•3 . . 
. 156 
•9 . 
. . 468 
•6 . , 
, . 312 
•25 . . 
. 130 
•8 . 
. . 416 
•5 . . 
, . 260 
•2 . . 
. 104 
.75 . 
. . 390 
•4 . . 
, . 208 
1 . . 
. 52 
