ASTRONOMICAL OBSERVATIONS. 



Error of the line by a Urfx Majoris, nnd y Ccphi. o 1 3" 

 Do. by a Urfae Miii. and s Urfc Majoris. o 23 



z)o 36 

 Mean error towards the eaft - o 18 



This correftion of 18° was made on a bafe of 24 perches. 



The fame night, we alfo took the greatefl deviation of the 

 pole ftar, {a Urfx Min.) and the error difcovered in the hne by 

 that method did not differ more than i * from a mean of the 

 other obfervations. — It is alfo worthy of remark, that we had 

 not correfted for fomewhat more than 54 miles : from v/hich a 

 conclufion may be drawn very favourable to the method ufed in 

 carrying on the line, otherwife the error muft have been more 

 confiderable in fuch a diflance. 



On the fixth day of Oftober, diftant from our firfl flation 

 90 miles, the direftion of our line was examined by the follow- 

 ing obfervations. 



DifF. in time between the paflage of a Urfse Min. and,! ©''4' 56'' 



s Urfas Maj. over our line. . . . f 



Right Afcenlion of « Urfx Min. o' 1 2° 35' 5 1" 



The above error in time by a Urfce Min and '- Urfe Maj. is 

 equal to an angle of 34'^, which was to the weft. This error 

 was corrected on a bafe of 48 perches. 



On the 17th of Oftober, diftant from our firft pofition about 

 100 miles, we examined the direftion of our line by the fol- 

 lowing obfervations. 



Diff. in time between the paflage of y Capricorn, and ^'^ o''2' i6" 



Cephi over our line ... 



Right Afcenfion of > Capri. 10^22° 3' 9 



Do. of /3 Cephi. 10 21 27 17 



Diff. - - ~c 



'\ 



35 T3 = mtimeto o 2 23 



Error of the line in time. • . . -007 diff. 



This error in time, (by thofe ftars,) is equal to an angle of 

 46' which is to the weft. 



F Diit 



