ic8 ASTRONOMICAL and 



correlponding forenoon, and afternoon obfervations, were 

 added up in feparatc furns, and divided by the number 

 of terms for the means, by which they were reduced to 

 a fingle expreffion, as entered in the journal or diary. 

 The three fextants g^ve nine obfervations, and it fre- 

 quently happened that the extremes of the nine obfer- 

 vations, did not differ more than i or i-|- feconds. After 

 the forenoon obfervations were made, the fextants were 

 carefully laid away, care being taken not to touch the 

 indexes till the afternoon obfervations were completed. 



i4thly. Two two-pole chains of the common con- 

 ftrutlion. 



The apparatus on the Spanifh fide was much lefs con- 

 iidprablc : it confilled of the following inftruments. 



I ft. An excellent fextant, which graduated by the 

 vernier to lo feconds: It was prefented by William 

 Dunbar, Efq. to Governor Gayolo, after my arrival in 

 that country. 



2dly. An aftronoroical circle executed by Mr. Traugh- 

 ton of London, for the above mentioned William Dun- 

 bar, and fold by him to Governor Gayofo to be ufed on 

 the boundary. This inftrument is In itfelf a portable ob- 

 fervatory, and executed in a mafteriy manner ; — the dif- 

 ferent circles are by the vernier divided into 5 feconds, 

 and may very eafily by the eye, aided with the microf- 

 cope be again fubdivided. The graduations appear to 

 be perfeft, fo far as human dexterity extends. This in- 

 flrument was fent away a few days before the Indians 

 made an attack upon us at the mouth of Flint River. 



3dly. An old furveying compafs very flightly made, 

 and was for a fhort time accommodated with a wooden 

 fight, which was done (with confiderable dexterity) by 

 Mr. Patrick Taggert, a deputy furveyor on the Spanifh 

 fide, who was very ufeful in every ftage of the bufinefs. 



Obfervations 



