260 Sir D. Brewster on his Formula for Mean Temperature. 



Table 1 1 1. Extreme Variations of the Octogesimal Tliermometer 

 at Sevastopol, in each Month oftheYears 1828—1830. 



Table IV. — Greatest Variation of the Octogesimal Tliermo- 

 meter at Sevastopol, on the different Days of each Month of 

 the Years 1828, 1829, 1830.' 



Table V. — The Means of the Maxima and Minima of each 

 Day, for every Month of the Years 1828 — 1830. 



and Edin. 



[OhservatioJis on the preceding Results (see Lond, 



Phil. Mag. and Journ. No. 2. p. 135). 



It appears from the first of the preceding Tables, that the 



mean temperature of Sevastopol (or four successive years, from 



