24 
ME. J. E. H. GORDON ON THE DETERMINATION OF 
Set 2 (B). 
Passages in + direction. 
h. m s 
10 9 3i 
10 9 55i 
10 10 47 
10 11 381 
10 12 30i 
10 13 22 
In — direction. 
h m s 
10 9 29£ 
10 10 21 
10 11 13 
10 12 41 
10 12 56 
Mean . . 10 11 12-750 
10 11 12-766 
Time of middle negative passage : — 
From + observations 
From — „ 
Mean . 
h m s 
10 11 12-750 
10 11 12-766 
10 11 12-7833 
Interval between mean negative passages A and B, 16 min. 0-7791 sec. 
Number of passages =260-1, that is 260. 
Time=3-6953 sec. 
Set 3 (A). 
April 28, a.m. Mean temperature 11 0, 5 C. 
Passages in + direction, 
h m s 
10 34 0 
10 34 514 
10 35 43f 
10 36 35 
10 37 27 
10 38 184 
In — direction. 
h m s 
10 34 251 
10 35 17i 
10 36 9i 
10 37 1 
[10 37 52f]* 
Mean. . 10 36 9-222 
10 36 9-150 
Time of middle negative passage : — 
From + observations . 
From — „ 
Mean . . 
h m s 
10 36 9-222 
10 36 9-150 
10 36 9-186 
Interpolated. 
