370 ASTRONOMICAL and 



h > » 



Difference in A. R. between f Draconis and « Aquilae on"! „ ,o .,^ 



, , ^ , . ' ^ O 2D 30.? 



the T2th, mean lolar time J -* 



Obferved diflference on the I2th. . . . . o 28 26 



Error of the meridian to the weft . . . . o o 0.5 



Difference in A. R. between /Draconis, and » Aquils on! „ , 



the 1 3th, mean folar time J '^ 



Obferved difference on the 13th . . . . o 28 27.0 



Error of the meridian to the eaft . . . .00 0.5 



Thofe ftars being well fituated to deteft any error in the meridian, and 

 as the error comes within the probable error of taking an obfervation, it may 

 be confidered fufiiciently correct. 



Examination of the meridian by the equal altitudes* and tranfit of the 

 O 's centre on the 13th of September. 



Equal altitude t of the Sun on that day. 



h < »' h ' II 



A. M. 8 9 48. P. M. 3 36 56 

 Add .12 



Deduft forenoon's obfervation 



Divide by . . . . 



Half . . . 



Add forenoon's obfervation 



Add equation for changes of the ©'s declination 



©'s centre on the meridian by equal altitudes at 

 ©'s centre on the meridian by obfervation at 



Difference to the weft 



The 



• The equal altitudes before this day were taken with the equal altitude 

 inftrument. The cup for holding the water with the roof, for making an 

 artificial horizon being ftolen by the Indians, and not returned till die 12th. 

 By a conftant praiflice of 1 6 years I find the equal altitudes taken from the 

 artificial horizon rather more accurate, tlian when taken with the equal al- 

 titude inftrument. 



