•MPORTS OF THE PKOCEEDINGS 
OF THE 
EOLOGICAL & POLYTECHNIC 
SOCIETY 
OF THE 
WEST RIDING OF YORKSHIRE, 
1850 . 
®otttettts. 
Page 
Meeting at Halifax, June 6th, 
, : 1850- 
Address of the Chairman 109 
“ On a new and cheap Voltaic 
Battery for the production of 
the Electric Light,” by Mr. 
Christopher Leefe Dresser, 
of Leeds 110 
“ On some Phenomena of Dia- 
■ Magnetism, with Experi- 
ments,” by William Sykes 
Ward, Esq., of Leeds 114 
Meeting at Barnsley, October 
29th, 1850- 
Statement of Accounts 138 
“ Comparative View of Cir- 
cumstances attending some 
of the Explosions in Coal 
LEEDS: 
PRINTED BY EDWARD BAINES AND SONS. 
Mines,” by William West, 
Esq., F. R. S., Assoc. Civ. 
Page 
138 
“ On the Existence of Four 
Crystalline Species of Car- 
bon,” by H. C. Sorby, Esq., 
F.G.S 159 
“ On a New Gas Stove,” by 
William Sykes Ward, Esq... 168 
“ On the Excavation of the 
Valleys in the Tabular Hills, 
as shown by the Configura- 
tion of Yedmandale, near 
Scarbro’,” by H. C. Sorby, 
Esq 169 
“ On Fuel : its Nature, Value, 
and Application,” by W. L. 
Simpson, Esq,, C. E.,Thurns- 
coe Hall, Doncaster 173 
