390 
]\IE. WAEEEN BE LA EIJE ON THE 
and moon ; X the position of the centre of the moon at the middle of the eclipse. 
a 5, the distance of the centres at the epoch of No. 22, was 385"-7 
ac, the distance of the centres at the epoch of No. 28, was 323''‘8 
the position-angle of the line joining the centres at the epoch of No. 22 was 295° 28' 24" 
the position-angle of the line joining the centres at the epoch of No. 28 was 119 23 21 
whence the angle c « 5 =176 5 3 
h min. sec. 
The epoch of No. 22 was ... 2 48 25’6 
„ No. 28 was ... 3 13 53-7 
and the interval, in minutes and decimals of a minute, 25*468. 
From these data the angle X.ca, equal to the angle aac, was found to be 2 7 43*7 
And the angle X5a=/3«^5 1 47 13*3 
The side d X was computed to be 385*512 
The side c X was computed to be . . 323*576 
And the line d c, which represents the space travelled over 
during the interval, was consequently 709*088 
The proportion of the interval of time occupied by the moon ggg 
in travelling from 5 to X was computed to be . . . . 13 50*8 
The proportion in travelling from X to c 11 37*3 
The mean rate of motion per minute 0 27*84 
The nearest approach of centres, « X, was found to be . . . 0 12*03 
The epoch of No. 22 was . 
Add time-interval 5 to X . 
Middle of the totality . . 
h m sec. 
2 48 25*6 
0 13 50*8 
3 2 16*4 
That of No. 28 was . . 
Deduct time-interval X to c 
li m sec. 
3 13 53*7 
0 11 37*3 
3 2 1^4 
The position-angle of a 5 at 
the epoch of 22 was . . 
Adding the angle ^ab . . 
"We obtain as the direction 
of motion of the moon’s 
centre during the totality 
from 
O / II 
295 28 24 
1 47 13*3 
The position-angle of « c at 
the epoch of 28 was . . 
Deducting the angle aac . 
297 15 37*3 to . . 
o / II 
119 23 21 
2 7 43*7 
117 15 37*3 
By combining Nos. 22 and 29, and Nos. 23 and 28, similar numbers were computed, 
which, together with the preceding results, are given in the following summary : — 
