THERMOMETRICAL OBSERVATIONS. 229 



Mean latitude North . . 31 



From the above refult for the latitude, it appears that the obfervatory 

 was too far north by 2 .7 or about 272 feet, and die guide or compafs 

 line being 68.8 feet fouth of the obfervatcry, it appears that the guide or 

 compafs line oppofrte to the oblervatory was too far north by 213.2 feet. 

 This correction of 213 2 feet was carefully laid off to the fouth, and the 

 guide, or compafs line corrected back to the 21ft mile, by laying off to the 

 ioutli from the end of each mile a proportional part nf the 213.2 feet 

 — For a chart of this part of the boundary fee Plate VII.* From the ter- 

 mination of the 213.2 feet, another guide or compafs line was carried 

 eaft 99 miles, and 194 perches, to tlie weilern bank of the Mobile, or 

 Tombecby river, where tlie following obfcrvations were made. 



1799. 



March 1 8th. Put up the clock and fet it to apparent 

 time nearly. 



Set up the large Sector with the Face to 

 the Eaft. 



19th. Cloudy with heavy rain at night. 



20th. Flying clouds great part of the day, heavy 

 rain in the afternoon, and evening, attended 

 with fharp lightning, and remarkably loud 

 thunder. 



2 1 ft:. Cloudy all day with a little rain and ftrong 

 north wind, cleared off about midnight with 

 a violent wind from the N. VV. 



Obferved zenitli diftance of a Coro. Borealis 3° 36' 55" s. 



The above obfervation is doubtful owing to die violence 

 of die wind which affefted the plumb-line. 



* The offsets were too fmall to be laid down on the chart. 



Vol. V. H h 22d. 



