Was exhibited; and, being called upon by the Chairman, Mr. Sopwith gave the following explanation:—
He observed, that the general subject of plans and sections of mines and mineral districts was one of great importance to the community, and especially deserving the notice of Societies like the present. The preservation of such plans is requisite, in order to preserve a knowledge of what has been done in subterranean works; and, with this object in view, it is important that such representations should be as clear and explanatory as the circumstances will admit of. The usual drawings employed in connexion with mining, are what are well known by the name of Ground Plans and Sections; the one representing all horizontal objects, the other all vertical objects. Every object, therefore, which departs from a parallelism with these planes, must be, to a greater or less extent distorted; and this imperfection is common to all plans or drawings which are confined to the representation of one plane only. This description of plan and section, however, from its great simplicity and universal adoption, is that on which we must be chiefly dependent for perpetuating a knowledge of mining operations. Mr. S. stated that Government had established an office in connexion with the Museum of Economic Geology, for the purpose of preserving mining records. Draftsmen would then be employed to copy, on an uniform scale, all such plans and sections as may be deemed of sufficient interest to be thus preserved; and, by this means, ...
- © Yorkshire Geological Society, 1839-42