370 



The comet was dim this evening, caused by a mist or smoke 

 which obscured the lower parts of the atmosphere, and became 

 invisible before any more observations could be taken. 



16th. At 6h 57' 0" Comet from a Lyra:. . 40° 17' 10" 



The atmosphere was again so misty, or rather smoky, that 

 no more observations could be taken : the cause of the smoky 

 state of the atmosphere at this season, in our country, is the 

 setting fire to the dry grass of the immense prairies or savan- 

 nahs, and pine wood forests, in our neighbourhood ; the smell 

 of the burning pine, and other resinous aromatick vegetable 

 matters is sometimes very strong, although the conflagrations 

 which occasion it, are not supposed to be nearer than from 50 to 

 100 miles: dense clouds are frequently formed of the smoky 

 vapour, from whence proceed violent tempests, with thunder 

 and lightning, and torrents of rain of a brownish black colour. 



The apparent length of the comet's tail was this evening 

 about 2° 43' 30". 



b ' v O ' v 



1807- Octr. 23. At 6 19 30 Comet from a. Lvrs. . . 31 59 20 



38 30 from * Corona: . 14 26 50 



51 30 from j3 Herculis. . 47 55 



24. At 6 26 30 from a. Corona;. . 14 58 40 



37 30 from a Lyra. . . 30 50 30 



54 30 from @ Herculis. . 1 30 15 



7 22 30 from Jupiter. . . 71 17 O 



Novr. 5. At 6 36 from * Lyra:. . . 17 38 50 



49 from Jupiter. . • 67 49 10 



