174 Geological Survey of Pennsylvania. 
engraved, on a uniform scale of two miles and a half to an 
inch, by Henry S. Tanner, author of the New American At- 
las, &c. &c. from original documents and surveys, to be fur- 
nished by Lardner Vanuxem, professor of geology and min- 
eralogy, and Major John Wilson, late civil engineer of Sout 
Carolina, geographical surveyor. e whole to be under 
‘the superintendence of Peter A. Browne, the original pro- 
jector. 
On the 30th of Sept. 1826, the plan of the above survey 
and publication was submitted to a public meeting assembled 
in Philadelphia for that purpose, who resolved that the pro- 
position should be adopted, and passed a vote of thanks to 
the proposer. They also appointed a highly respectable 
committee to take the subject into consideration, and a re- 
port was made, at a meeting held 6th December, 1826, which 
was unanimously adopted. From that report the following 
statements are cited. 
_ “ Pennsylvania is undoubtedly the richest state of the Un- 
ion, in mineral productions: her soil presents every variety 
of formation, except perhaps the volcanic, and: her geology 
would therefore possess a general interest. Of the minerals 
furnished to us in such great abundance, nature seems to have 
particularly selected those which are the most useful to man. 
Among these may be mentioned, iron of the finest quality, 
anthracite and bituminous coal in inexhaustible quantities, 
salt, excellent lime, lead, copper, and zine. 
“‘ We know that Pennsylvania possesses these mineral rich- 
es; but of the manner in which they are distributed over its 
surface, their position relatively to each other, and, in a word, 
of the geology of the state, we are greatly ignorant. To re- 
‘move this ignorance, and to convey a general knowledge of 
our mineral productions, by printed descriptions, public col- 
ons, and geological maps, is a project which cannot fail 
“* Of the means which can be adopted for attaining this im- 
portant object, the committee are convinced that the plan pro- 
posed by Mr. Browne is the most eligible, and ought to re- 
ceive the public approbation and support. By dividing the 
whole state into “gusaas ee publishing a large number of 
Separate maps, the expense of the work will be undoubted! 
anuch inereased; but this disadvantage will be more than 
