THERMOMETRICAL OBSERVATIONS. 215 



Refult of die equal altitudes of the Sun taken at Bayou Sara. 



Daily lofa. 



// 



. 98 



. 9.2 



■ 91 



• 9-5 

 . 9.2 



• 7-4 



• 7-7 



Clock ran down early in the morning of the 31ft, 

 wound it and fet it a-going. 



Clock too faft mean time Aug. 31ft. . . 4 S° 

 do. . . Sept. ift. . -4 23-3 



Daily lofs. 

 II 



. 6.7 



do 2d. . 4 15.7 ■ '' 



,6 



- Longitude deduced from the eclipfes of Jupiter's fatellites, obferevd at 



Bayou Sara. 



Auguft 9tli. Emerfion of the 2d fatellite 6'' 3' 17"") 



1 6th. Immerfionof . do. 6 3 3 Weft from 



EmerHonof . do. 6 3 58 f Greenwich. 



23d. Immerlion . do. o 4 27 | 



Sept. ift. Immerfion of the ift do. 6 5 21 J 



When the firft point of latitude was determined on the Miffiffippi, the 

 annual inundation prevented our approaching the banks of the river : But 

 on the 28th of July, the waters having fublided it was mutually agreed 

 that WiUiam Dunbar, Efq. his Cathohc Majefty's altronomical commif- 

 fioner, fhould proceed to the point D at high water mark, and extend 

 the line from that point to tlie eal^ern b.ank of the river aforefaid, which he 

 completed on the i8th of Auguft, and whofe report is in the following 

 words. 



" On the 28th of July, the line then approaching the loth mile, and 

 learning that the waters of the inundation were retired within the banks of 

 the Miflhrippi, fo that the lands were become fufficiently dry to give firm 

 footing to the labourers, the aftronomer for His Catholic Majel^y taking 

 upon himfelf the extending of the line through the river low ground to 

 the eaftern margin of the Milliflippi. The party allotted for this fervice did 

 accordingly encamp at the point D, pufhing the line forward in continuation 

 of the tangent commencing at the point B. Judging the prefent a con- 

 venient poiition for verifying the direiSion of the line, the aftronomer for 

 His Catholic Majetly eftablilhed his oblervatory near the point D, and 

 made the following obfervations with the circular inltrument* placed in 

 the direiftion of the tangent, viz. 



Ff 2 "On 



* The aftronomical circle already mentioned. 



