728 The Account, &c. 



as from the heights of the mercury in the barometer, will be as 

 follows. 



Arcs. Obs. Ang. Barom. Diff. 



1 317 282 



35 



2 60 15 45 



The little done on this subject, points out the necessity of 

 doing more; it therefore remains with me to observe, that I 

 shall lose no opportunity of employing the apparatus committed 

 to my charge in the best and most diligent manner, both as 

 relating to matters of refraction, and to all others connected with 

 the Trigonometrical Survey. 



In the Introduction, page 540, it is stated that this Account would be comprized in 

 three Sections, but it was afterwards thought more convenient to divide it into four-- 



In Page 583, line penult; dele and Prittlewell. 

 ■*t- 665, 14, for 1792, read 17721. 



. 





