Places, 
1 
Obferved durati- 
ons. 
Ml ] 
Duration withou 
parallax. 
Difference 0 
durations. 
Differ, 
for i"o] 
parallax. 
Sun's par- 
allax. 
Tobolfki - - 
Cajaneburg - 
Tornea 0 - - 
Tornea 0 - - 
Abo - - - 
Upfal - *. 
Upfal .. - - 
Upfal - - - 
Hernofand - 
Stockholm - 
Stockholm - 
Calcutta - - 
.Madrafs - - 
h 
5 48 53 25 
5 49 54 
5 50 09 
5 50 21 
5 50 09 
5 50 26 
5 5° 07 
5 50 02 
5 50 26 
5 5 ° 42 
5 50 45 
5 50 36 
S 5 i 43 
h 
5 59 *6, 64 
/ // 
10 23,39 
9 22, 64 
9 *7, 6 4 
8 55,64 
9 07, 64 
8 50, 64 
9 ° 9 , 6 4 
9 15,64 
8 50, 64 
8 34, 64 
8 31,64 
8 40, 64 
7 33,64 
// 
64, 09 
57 , 32 
5 <A 83 
56, 83 
55 > 12 
53,67 
53,67 
53,67 
53 , 65 
53, 62 
53, 62 
53 , 3 i 
f6, 36I 
9, 726 
9,815 
9,636 
9,425 
9,935 
9,888 
10, 241 
10, 352 
9, 890 
9,579 
9,523 
9 , 769 
9 , 7 8 5 
N. B. The 4th column contains the difference be- 
tween the obferved and calculated duration ; in the 
5th is given the difference in the duration for a dif- 
ference of 1 " in the o ’s parallax, and the 6th column 
is obtained by dividing the 4th by the 5th. 
The mean of all the refults is 9", 8 12: and if 
we rejed two of the obfervations at Upfal, which dif- 
fer rnoft in excefs, the Sun’s parallax is 9^,724, 
agreeing very nearly with the quantity refulting from 
a companion of Ibrne of the obferved durations with 
the fhorteft obferved at Tobolfki and Cajaneburg. 
We may alfo proceed to find the Sun’s parallax by 
means of the lead diftance of the centers as obferved 
in two or more places where the effed of parallax 
was contrary ; or if the leaft diftance of the centers 
was only determined at one place, it may be found 
by calculation at any other place, where the total du- 
ration was obferved. But in this and the laft cafe the 
elements of calculation are required with fo rigorous 
Vol. LIII. Q q q an 
