272 Geographical Position of the 
To reduce these several results to the meridian of Green- 
wich, we assume the following differences of longitude from 
Greenwich— 
Meise 
Edinburgh... + 12° 43°60 
Cambridge....... — 0° 28°54 
Onctond er eiat 2: Ba Ou BO 
and these being applied to the means, we obtain for the 
longitude of the Hobart Town Observatory as follows :— 
Observations at MOON’S FIRST LIMB. MOON'S SECOND LIMB. 
Hobart Town eee 
umber 
of Longitude. 
Observations. 
Number 
of Longitude, 
compared with : 
Observations 
H. M.S H. M. 8. 
Greenwich... 9 9° 49° 26:03 3 9° 49° 15°68 
Edinburgh... 11 9- 49° 24°12 4 9> 49° 21-72 
Cambridge... 4 9: 49: 31-94 2 9° 49° 20°24 
Oxtord yee. 5 9° 49° 25°67 
Giving to each result a weight proportionate to the number 
of observations, we obtain— 
He M. YS. 
From twenty-nine observations of the 
Wi oomis dist Wane ett. saeanscaeficesinte este 9° 49° 26:06 
From nine ditto, Moon’s 2nd limb, 9° 49° 19°38 
Or, as the final result— 
H. May aS. 
9° 49° 22°72 
for the longitude of the Hobart Town Observatory east of 
Greenwich. 
