Mapoteca Geologica Americana. — Marcou. 97 
taining his great discovery of the Taconic system, well represented 
and colored, instead of being destroyed as Emmons thought, was only 
concealed in the cellars of the State House of New York, at Albany. 
It was not issued during the lifetime of Dr. Emmons ; but in 1877 
some mutilated copies were distributed by the State Librarian at 
Albany, as the real Geological map of the state of New York. 
Finally, in 1887, the map as dressed and colored by Emmons, with its 
full title, has at last come out from the cellars of the New York's 
Capitol. The suppression of the map during Emmons' life, and many 
years afterward, was due to the existence of the Taconic system, op- 
posed by certain person or persons bound together to its destruction, 
not only as a system, but even as to its existence below the Potsdam 
sandstone considered wrongly by them as the oldest or bottom strati- 
fied beds in America. 
928 [244 a.] 
1859. — Geddes (Geo.), assisted by H. W. Clarke and D. L. Sweet. 
Geological map of Onondaga county, N. Y. Scale about 
1.6 miles to one inch. 
Accompanying: "Report upon the Geology, etc., of Onon- 
daga county;" published by the New York State Agricul- 
tural Society in its "Transactions for 1859, Albany.'" 
930 [244 b.] 
1859. — French(?).Geologicalmapof NewYork. Small scale; printed 
in the margin of French's map of New York. New York ? 1859. 
Black etching. 
IX. — Pdivsylranla, Dehnrure and Maryland. 
931 [274 a.] 
1837.— Rogers (H. D.) Map of Chester county. 
Accompanying: "Flora Cestrica, etc.," in " Plants of Ches- 
ter county in the state of Pennsylvania." by William Dar- 
lington, "V\''est Chester, Penn., 1837. 
The name of the author is not inscribed on the map, but is indicated 
in the preface page vii. A second edition of that map appeared with 
the third edition of the "Flora Cestrica," by William Darlington, 
Philadelphia, 1853; but no reference is made of its authorship by 
Henry D. Rogers, although the same geological map as the one of 
1837. 
932 [285 a.] 
1864. — Sheafer (P. W.) Official coal, iron, railroad and canal 
map of Pennsylvania, etc., showing the relative position of the 
various anthracite and bituminous coal fields, etc. , by authority 
of the legislature of Pennsylvania, Pottsville, Pa., 1864. 
Black etching. 
