THERMOMETRICAL OBSERVATIONS. 263 



3d, Thermometer 73° at fun rife, rofe to 91". 



— Cloudy great part of the day and night. 

 4th. Thermometer 76° at fun rife, rofe to 89". 



— Cloudy all the afternoon and night. 

 5th. Thermometer 74" at fun rife, rofe to 87°. 



— Several Ihowers of rain in the courfe of the 



day. 



Between 13, and 14 hours, traced a meridian by y Caf- 

 fiopeas, and « Urfas Minoris. 



Emerfion of the 3d fatellite of "H obfcrved at 14'' 40' 35"- 

 — a little foggy, but the belts were pretty diftiflcl, mag- 

 nifying power of the telefcope 120. 



h ' " 



Sirius pafled the firft fibre of the tranfit iallrument at 19 30 8 



Tlie meridian at . . . . . .19312 



The third fibre at . . . . . 19 31 52 



6th. Thermometer 73'' at fun rife, rofe to 89". 

 — A fine clear morning, the fky remarkably 

 blue. 



h ' " 

 O's preceding limb on the meridian at 1 1 54 8 A. M. 



Subfequent do. at . . . li 56 17 A.M. 



Centre at . . . . 11 55 i2.jA. M. 



When the above obfervation was made, the 

 tremor was fo excefllve that there was no pof- 

 fibility of bifei5ting the meridional mark with 

 precifion, nor of examining the line of colli- 

 mation with the neceilary accuracy. — Thun- 

 der-gufl in the afternoon. 



Immerfwn of the ift fotellite of li obfeived at 1 

 — Belts diilindl, magnifying power 120, 



c 



Sirius paffed the firft fibre of tl>e tranfit inftrument at 1 9 

 The meridian at . . . . 19 



The third fibre at . . . .19 



M m 2 



