Mi;. I iODDHX. 1 'l Statistical Account of the Exhibition. 145 



Table II. b. — Difference between Air and Depths. 



2 Feet 4 Feet 6 Feet 10 Feet 



Jan C-99 893 10*39 1239 



Feb 578 8-23 970 1176 



March, 288 472 596 801 



April, 1-43 1*15 0-44 138 



May, 2G3 5'31 5'87 578 



June, 0-59 441 6*80 9-22 



July, 0-04 305 5'38 8'52 



August, 097 100 2-88 576 



September, 1*52 094 0'23 -1-69 



October, 3-03 448 5*07 481 



November, 443 650 7'95 9*17 



December, 433 6*28 7*89 9-83 



The progress of heat from above downwards, commences in these high 

 latitudes later in spring than in more southern climates; and in like man- 

 ner the progress from below upwards, commences earlier in autumn. In 

 the northern latitudes, the development of vegetation takes place within 

 a much narrower " season," or space of time, than in the south. 



10th February, 1847. — Tlte Vice-President in the Chair. 



The following were admitted members: — Messrs. Donald Campbell, 

 Hugh M'Pherson, John Fyfe. 



A second vote was taken on the motion for a grant of £50 to the 

 Library Committee, and a report from that Committee recommending the 

 purchase of certain books was approved of. The Secretary laid on the 

 table a copy of the Biographical Memoir of the late Charles Macintosh, 

 F.R.S., presented by his son, George Macintosh, Esq. The thanks of the 

 Society were voted. 



The following Statistical Account of the Society's Exhibition in the City 

 Hall, during the Christmas and New- Year holidays, was then read : — 



XX TIT. — Statistical Account of the Philosophical Society's Exhibition, 

 during the Christmas Holidays. By Andrew Liddell, Esq. 



The Philosophical Society has frequently had private exhibitions of 

 models, manufactures, &c, for the gratification of its own members and 

 their scientific friends. The Town Council had, during the New- Year 

 holidays of 1845 and 1846, a gratuitous exhibition of a small collection 

 of works of art for the amusement of the public generally. It occurred 

 to certain members of our Society, that a union of these on a grand scale, 

 to embrace the very best objects in science and art that could be found, 

 would be instructive and amusing, not only to the learned and scientific, 



