180 
are found in connection with any particular seam of Coal, 
what Coal ? 
Limestones for building, for mortar, for water cement ; 
examples both before burning and after. 
Brick clay and the brick it produces ; fire clay and fire 
bricks; slates, flags, &c. 
Sand used in mortar and for casting. 
8. Road materials As gravel, slags, calcined sandstone, 
limestone, &c. 
9. Various Soils, and the Manures applicable to them — 
Marl, gypsum, &c. 
10. Mineral Springs Tables of analyses of their con- 
tents, and specimens of the matter, if any, deposited by 
them, and of the rocks by which they are accompanied. 
The interesting question of the increase of temperature 
with depth, too, might be fully gone into by our members ; 
the results, if collected and properly arranged, would be 
worthy of a place in any Museum. 
Besides these various objects, the Museum would not be 
complete, and much of its usefulness would be wanting, if we 
had not a great number of tables of Borings and Sinkings, 
drawn to a scale, as recommended by the council at a former 
meeting.* Plans and sections of the direction and extent of 
faults. Models and plans of coal mines, and of the several 
methods by which they are worked and ventilated, from 
which an inquirer would be able to select that, which aff'orded 
the greatest safety to the miner, and the greatest proportion 
of coal to his employers. The different modes of draining 
mines, — by the common pump, force pump, hydraulic belt, 
&c. ; and in fact models of machinery of all kinds employed 
in mining. 
Nor should we neglect to pay our best and most earnest 
attention to the improvement of the Safety-lamp, by a fair and 
* See the Report of the Tenth Meeting, p. 24. 
