IX UPPER HINDUSTAN. I47 



cess to the anrle observed, between the sun and his 

 image in Mercury ; if it appeared too small, subtract 

 the defect, to yve the true angle. Thus, March the 

 13th, \-:l error of the sextant vva? 2' 52* to be sub- 

 tracted j but the measurement of the sun's diameter 

 exceeds the truth by 24". Therefore, this quantity 

 is to be added to the observed angle, the observation 

 being, probably, so much too open. 



The angle between the sun and his image in quick - 

 filver, that day at noon, was 123 33' 45" 



Error Sextant — 2' 52" 



Do. Observation 4- o 24 



Diff. — 2 28 



2) 123 31 17 



61 45 38 5 

 Diff. refr. and parallax — 26 5 



61 45 12 



Sun's Semidiameter 4- — 167 



62 1 19 

 Sun's Declin. South -f 2 36 23 



Co-Latitude 64 37 42 



Latitude of Burwa Sagur 25 22 18 



which is 13" less than in the following list, where 

 this error was not allowed for. 



The secondary, or horizontal adjustment, made 

 by a small screw at the fore-part of the little specu- 

 lum, was, from time to time, carefully attended to. 



L 2 The 



