V 
The preliminary business having* occupied the first 
two or three sittings, Professor Johnston, of Durham, 
in May, 1838, delivered the first public lecture, "On 
the Economy of a Coal Field," which was published in 
a separate form. 
The following papers were submitted at the sub- 
sequent Meetings, of which no permanent record 
is preserved except in the local journals of the 
period : — 
" On the Dislocations in the Valley of the Don," by H. 
Hartop, Esq. 
" Illustrations of the Geology of the Yorkshire Coal Field," 
by the Rev. W. Thorp. 
" On the Inefficiency of the Compass for Mineral Survey- 
ing, and Suggestions for taking the Magnitude of 
Angles," by C. Morton, Esq. 
" On the Mode of Ventilation adopted at Middleton 
Colliery," by T. W. Erableton, Esq. 
" On the Non-identity of the Haigh Moor and Roth well 
Haigh Seams," by Henry Briggs, Esq. 
A Comparison of the Yorkshire and Lancashire Coal 
Fields," by the Rev. W. Thorp. 
" On the Miners' Safety Fuze," by T. W. Embleton, Esq. 
** On an Improved Safety Lamp and Suggestions for Light- 
ing Mines by means of the Fire Damp," by Mr. 
Fletcher. 
" Remarks on the Section from the Bradgate Rock to the 
Forty Yards Coal at Middleton," by T. W. Embleton, 
Esq. 
