OF HEAT FROM THE MOON. 
597 
Table (continued). 
1871. 
Zenith-distances. 
C-O. 
1872. 
Zenith-distances. 
C-O. 
O O 
O O 
Dec. 25. 
30-0 30-7 
+ 53 
Feb. 16 . 
39-4 41-7 
+ 394 
„ 32-7 
- 48 
„ 43-1 
+ 665 
„ 36-1 
+ 128 
„ 45-0 
+ 531 
„ 39-8 
+ 247 
,, 65-7 
+ 383 
„ 44-0 
+ 154 
» 67-5 
+ 461 
„ 48-3 
+ 111 
Feb. 20. 
60-7 62-7 
+ 198 
Dec. 26. 
29-3 47-8 
+ 501 
„ 64-5 
+ 258 
„ 56-2 
+ 132 
„ 66-4 
+ 164 
Dec. 28. 
31-1 33-3 
+ 201 
Feb. 24. 
42-8 43-3 
+ 2 
„ 36 - 5 
+ 178 
„ 43-4 
— 266 
„ 37-2 
-161 
„ 44-0 
- 37 
„ 40-3 
— 201 
„ 44-8 
+ 82 
„ 45-4 
— 235 
„ 45-5 
-394 
„ 49-9 
— 467 
,, 46-7 
— 486 
1872. 
„ 47-7 
+ 493 
Jan. 2. 
51-0 51-2 
+ 405 
Mar. 21. 
36-3 37-4 
+ 32 
Jan. 5. 
67-9 68-2 
+ 177 
„ 39-8 
+ 234 
Jan. 18. 
45*4 46-8 
- 36 
Mar. 22. 
42-9 44-1 
+ 53 
„ 48-0 
+ 127 
„ 45-3 
- 36 
„ 54-7 
- 52 
„ 48-2 
+ 88 
,, 56-6 
+ 23 
„ 54-3 
+ 117 
„ 58-2 
+ 242 
» 36-3 
+ 163 
„ 68*2 
-339 
Mar. 24. 
51-5 53-5 
- 90 
Jan. 19. 
42-9 44-6 
+ 449 
„ 54-5 
-117 
„ 56-9 
-147 
Jan. 20. 
59-8 62-0 
+ 103 
„ 59-3 
-216 
Jan. 22. 
50-1 54-2 
-454 
Apr. 15. 
57-1 59-3 
+ 493 
„ 57*2 
-846 
„ 61-4 
+ 208 
Jan. 30. 
62*2 63-3 
+ 15 
Apr. 18. 
38*8 42-2 
+ 209 
„ 64-8 
+ 317 
„ 45-3 
+ 296 
„ 66-3 
224 
„ 46-8 
+ 294 
„ 68-0 
— 323 
„ 56-3 
+ 62 
„ 69-8 
- 98 
„ 58-3 
+ 236 
„ 60-3 
- 48 
„ 64-4 
— 52 
„ 66-7 
+ 282 
These errors were now treated in the ingenious way employed by Seidel (IJnter- 
suchungen, p. 41) — a Table was formed in which the zenith-distance was the argument 
for both horizontal and vertical columns ; the errors were now entered at both points of 
intersection corresponding to the pairs of altitudes to which they belong. 
When the lesser zenith-distance is the argument for the vertical column, the sign 
given in the Table was retained, in the ether case the sign was changed ; in this way all 
the errors come to stand on one side of the diagonal as they are in the Table, and on 
the other side with changed signs. The vertical and horizontal columns were now 
examined to see whether one particular sign predominated in any part. In fact the 
following corrections of the values of <pz were found to be indicated : — 
4 L 2 
