350 REPORT—1840. 
formed ; and I have no hesitation in stating, that when this class 
of observations are multiplied and extended, they will tend to 
general results of as great importance in pre-determining at- 
mospherical changes, as those which have enabled the astro- 
nomer to predict the phenomena of the planetary system. 
Sir David Brewster then proceeded to give a brief and 
general account of the results obtained from the observations 
in Inverness-shire, leaving the numerical and more minute de- 
tails for the report, which will be published in a future 
volume of the Transactions of the Association. 
In giving an account of the observations on temperature, the 
results obtained at Kingussie and Inverness were compared 
with hourly and two-hourly observations made in other places, 
as exhibited in the following table: 
i |. ees 
Places of Observation. Latitudes Longitude. poe! al gs Mean 2 & Ha Ete 
N. thesea.| sea, | temp. ae Pope] FES 
z| § leFs 
Inverness ...... » 579934] 412w. oie Lmile {5 43| 8 $1) 7 44111 13 
Rangulaie fs 2 [57 4 | 4 5w.| 750/40 milesi42 78| 8 51/ 7 35|10 44 
Bethe; 2 22\5556 | 313w.| 25600 fecti48 36 9 13 8 27:11 15 
Plymouth ...... £5) 5021 4 6w.| 75/400fect|52 (8 |7 {11 
Pode 2e0 E*l4536 [1155z./... | .. |... | 841] 7 Sal 14 
Philadelphia...) |3957 |75 9w.| ... |... [49 28] 8 10| 7 30/11 20 
Colombo... £2] 657 | 80 x.| 36/2 miles |s0 1610 35 9 3010 55 
Kandy, sugnct S<|.718 | 8049z.\1682} ... [74510 |9 [1 
Trincomalee ... 25 833 [s124z, | 60) ... [81 {10 35) 8 4011 5 
Mean of all ............... 11 5 
From this table it appears that the mean value of the critical 
interval is 11 hours 5 minutes, differing only 10 minutes from 
the result which Sir David Brewster first obtained from the 
hourly observations at Leith. 
Sir David then stated to the Section, that since the Asso- 
ciation met he had obtained from Mr. Caldecott (now present), . 
Astronomer to His Royal Highness the Rajah of Travancore, 
the result of a series of hourly observations made at the Ob- 
servatory of Trevandrum, situated in east longitude 55 8™, and 
