THERMOMETRICAL OBSERVATIONS. 253 



Aug. 9th. Thermometer 70° in the morning, rofc 

 to 75°. — Heavy rain all the forenoon, cleared 

 off at noon. — Thunder-guft in the afternoon, 

 clear in the evening. 



Obferved zenith diftance of « LyrrE (fmall fedlor) 7 32 45 n. 



do. . . /3 Pegafi . do. 4 3 22. j s. 



do. . . a Andromedx do. 3 3 4.5 s. 



do. fmall feiflor do. . . 3427 s. 



do. . . ya Andromedx . 3 31 7'5 ". 



do. fmall feiftor do. . . 3 29 31 n. 



At 19'' 20' a cloud formed In the zenith 

 which in a few minutes extended in a belt al- 

 moft to the eaftern and weftern horizon, at 

 20'' it difappeared, by this circumftance the 

 obfervation on ^ Tauri was loft. 



Obferved zenith diftance of Caftor . i 16 57-5". 

 do. . . Pollux . 231 58.5 s. 



The obfervations on Caftor, and Pollux are fomewhat 

 doubtful, each of them being feen but once, and that for a 

 few feconds only between the clouds which moved with 

 great rapidity from the weft, to the eaft. 



1 0th. Thermometer 70° all laft night, raifed to 

 81°. — Rain at noon. 



At 5'' 55' prepared to obferve the zenith diftance of 

 « Coro. Borealis, — in two minutes a fpace of feveral degrees 

 about the zenith was obfcured by a cloud from the weft, at 

 6'' 6' the fky was fufficiently clear but the ftar had paffed 

 the field of the inftrument. 



Obferved zenith diftance of « Lyras (fmall feiflor) 733 4-5 n. 

 do. . . ;2 Pegafi do. 4 3 31-5 ^• 



Cloudy the remainder of the 24 hours. 

 Vol. V. L 1 nth. 



