Office Bearers of the Society. 69 



and as is sometimes necessary in the case of ships, forcing pure air. 

 Both these functions may be performed at pleasure by the machine under 

 notice. The fan and driving apparatus are precisely similar to those pre- 

 viously explained, the only distinction being, that the blades are made 

 considerably wider, and the forcing and exhausting apertures are situated 

 on the same side. In the case of public buildings it is proposed to drive 

 the ventilators by water-power, derived from the water-pipes which tra- 

 verse the streets ; in ships manual power will suffice ; and in steam-boats 

 the engine would be available. 



Mr. John Wilson, ilr. Smith of Deanston, and Mr. Hart, made some 

 remarks on the applicability of the machine to the ventilating of mines 

 and other purposes. 



Mr. Dawsou and Mr. Cockey having finished the examination of the 

 vote-papers, reported that the following had been elected Office-bearers 

 for the current year, viz. : — 



Presilient. 

 Dr. Thomas Thomson. 



Vice-President,.. Walter Crcm. I Librarian,... R. D. Thomson, M.D. 

 Treasurer, Andrew Liddell. | 



StctetariES. 

 Alexander Hastie, M.P. | William Keddie. 



Council. 



A. Anderson, M.D. 

 A. Buchanan, M.D. 

 James Bryce. 

 Thomas Dawson. 



William Gourlib. 

 Alex. Harvey. 

 William Murray. 

 John Stenhouse. 



Prof. Wm. Thomson. 

 G.A.W.ARN0TT, LL.D. 

 John Wilson. 

 A. K. Young, M.D. 



bth December, 1849. — The President in the Chair. 

 Mr. Thomas Chapman was elected a member. 



The Librarian reported that Mr. R. Gardner had presented to the 

 Society a copy of his Natural History of the County of Staffiard. A vote 

 of thanks was passed for the handsome present. 



The Secretary reported that the Honorary Members of the Society are 

 the following, viz. : — 



Elected in 1826, Mr. Charles Chalmers, Bookseller, Edinburgh. 



— 1826, Professor William Couper. 



— 1827, Mr. Alexander Hastie. 



— 1834, Professor Thomas Graham. 



— 1849, Mr. John Joseph Griffin, London. 

 The following paper was read: — 



IX. — On some BemarkaUe Effects of Lightning observed in a Fa/rm-house 

 near Moniemail, Cwpar-Fife. Communicated by Wm. Thomson, Esq., 

 M.A., Professor of Natural Philosophy in the University of Glasgow. 



The following is an extract from a letter, addressed last autumn to mo 

 by Mr. Leitch, minister of Moniemail parish : — 



