SUMMARY 



OF THE 



Delivered since the last Avnual General Meeting. 



1828— Oc/oier 7.— Mr. T. B. Bunbury delivered a Lec- 

 ture oil Animal Physiology, in which he considered the 

 formation and peculiarities of bones; the heart and circulating- 

 system ; muscular system ; brain ; &c. accompanied with 

 appropriate illustrations. 



October 21. — Mr. W. H. Weekes delivered a Lecture 

 on Carbonic Oxide, Explosions in Mines, Davy's Safety 

 Lamp, &c. 



In this lecture, designed as a continuation of the combi- 

 nations of carbon, Mr. W. first directed the attention of his 

 audience to that peculiar form of gaseous matter denominated 

 Carbonic Oxide, from the circumstance of its being found to 

 consist of carbon and oxygen, in difl'erent proportions from 

 those which he formerly shewed to constitute Carbonic Acid 

 Gas. Its specific gravity, combustibility, and various pro- 

 perties were shewn by numerous experiments, after which 

 Mr. MV. introduced a series of practical illustrations relative 

 to the explosive admixture of carburetted hydrogen and 

 atmospheric air, so fatally destructive to miners, and recog- 

 nised by them under the appellation of fire-damp. The 

 investigation of this division of the lecturer's subject very 

 naturally led to the introduction of the grand discovery of 

 our illustrious English chemist. Sir H. Davy, namely, the 

 Sakkty Lamp, a large working model of which Mr. W. 

 introduced repeatedly into a spacious glass receiver, placed 

 ou the middle of the lecture table, and containing neaiiy 

 two cubic feet of the explosive gas, fire-damp, with entire 

 security, the wire gau/.e cylinder of the instrument during 

 the experiment inclosing a beautiful lambent flame, while 

 the atmosphere of gas by which the lamp was surrounded 

 remained tran({uil and unexplixled bencatli the hand of tho 

 optratoi, who liiini< ditiUly aricrwards demonstrated to the 



