CONTENTS OF VOLUME IV. 
PAGE 
Meeting at Doncaster, July 1st, 1859. 
" On the Geological Evidence of the Secular Expansion of the 
Crust of the Earth, and the Increase of its Orbit," Src, by 
Capt. Drayson, R.A., and the Rev. William Thorp 1 
In continuation : " The Astronomical Evidence," by Captain 
Drayson, R.A 27 
" A Short Account of the Tumulus opened at Thorparch, in March, 
1859," by F. B. Carroll, of Boston Spa 37 
Meeting at Sheffield, December 14th, 1859. 
"On the Temperature of the Springs in the Neighbourhood of 
Sheffield," by H. C. Sorby, Esq., F.R.S 40 
" On the Geological and Archaeological Contents of the Victoria and 
Dowkerbottom Caves in Craven," by Henry Denny, A.L.S., &c. 45 
" On Fire Clays," by C. W. Bingley, Esq., Ph.D., F.C.S 75 
" On some of the Differences in the Deposition of Coal," by Samuel 
Baines, Esq 77 
Meeting at Wakefield, April 18th, 1860 89 
" On the Geology of the Esk Valley," by John Watson, Esq 91 
" On the Ore Deposits of Lincolnshire," by Robert Hunt, F.R.S. ... 97 
"On the Recent Discoveries in Excavating the Remains of the 
Ancient Roman Town of Uriconium," by Thomas Wright, Esq., 
M.A., F.S.A 102 
Meeting at Barnsley, November 1st, 1860. 
" Observations on Colliery Ventilation," by Richard Carter, C.E. ... 110 
" On the Relation existing between the Occurrence of Explosions 
in Coal Pits and the State of the Barometer at and preceding 
the Time of Explosion," by W. R. Milner, Esq., M.R.C.S. ... 119 
" On Water Springs, and their Relation to Manufactures," by John 
Jebson, C.E.* 122 
" Considerations connected with the Relative Change of Land and 
Sea upon the Surface of the Earth," by Capt. Drayson, R.A. ... 130 
