THERMOMETRICAL OBSERVATIONS. 259 



. 31 I 148 



31 o 516 



31 I 100 



31 1 21 c 



Mean latitude north . . . . 311 9-4 



From the foregoing determinations it appcr.rs th.it l} e latitude given bv 

 the large fector, exceeds tliat given by the fmall one, i".i ; but as the re- 

 fuh given by the large one, ail cireumftanccs brought into view, may be 

 confidered five times as accurate as that by die fmall one : If therefore to 

 five times the latitude given by the hirge I'eclor, the latitude by the fmall 

 one be added, and the fum divided by fix, the quotient 31° i' 10" may 

 be taken as the true latitude of the obfervatory ; which exceeds the paral- 

 lel of 31'' by i' 10', or about 71 10.5 feet, which dillance vi'as carefully 

 laid off to the fouth, and the line corrected b ick as heretofore agreeably to 

 plate X. — From the end of the lafl mentioned correftion, a map, or chart 

 of the river Chattahocha, or Apalachicola, was taken to the mouth of Flint 

 river (fee Plate N" XI.) but the moutli of Flint river not being a proper 

 place for a courfe of obfervations, we encamped on a commanding emi- 

 nence where the following obfervations were made. 



Aug. 23d. Thermometer 91° in the afternoon. 



24th. Set up the clock, and equal altitude inftru- 

 ment. — Thermometer 75" at fun rife, rofe to 

 91°. 



Began the obfervatory. 



2 r th Equal altitudes of the Sun. 



•> ' A. M. &'' 35' 23". P. M. 3>> 22' 14". 



Thermometer 74° at fun rife, rofe to 88'. 

 — Finiihed the obfervatory and fet up 



Both Sedlors, with their faces to the Eaft. 



Shower between 1 2 and i o'clock, cleared 

 off in a fhort time, cloudy in the evening. 



Obferved zenith dillance of Caftor . 1° 37' 42" n. 



26th- 



