280 BIBLIOGRAPHY AND CARTOGRAPHY

Relations and origin of the iron ores in the so-called damourite slates associated with
the Auroral limestones of Pennsylvania. Conclusions equally applicable to Maryland
and Virginia. " Brown hematites were probably formed by the oxidation of iron pyrites,
but the former are not in the same place that the latter were " (p. 415). Discussion by
T. Sterry Hunt (pp. 417-421) and Persifor Frazer (pp. 421-422). The latter agrees in
general with the author, but takes exception to his view that the ore is " from pyrite
disseminated in the overlying limestones."

SULLIVANT, J. [Letter to Professor Christopher Johnston on Ber-
muda Tripoli in Maryland.]

Proc. Boston Soc. Nat. Hist., vol. xvii, 1875, pp. 422-423.

TONER, JOSEPH M. Contributions to the Medical History and Phys-
ical Geography of Maryland.

Trans. Med. and Chirurgical Faculty of Md., Baltimore, 1875.

Associates vital statistics with topography and gives thirteen topographic sections
of different parts of the state.

1876.
FONTAINE, WM. M. The Conglomerate Series of West Virginia.

Amer. Jour. Sci., 3rd ser., vol. xi, 1876, pp. 276-284, 374-384.
In a foot-note there is a reference to Mr. Tyson's section of the Cumberland Basin,
with inferences therefrom, p. 375.

FRAZER, PERSIFOR, JR. Origin of the Lower Silurian limonites
of York and Adams Counties. (Read Mar. 19, 1875.)

Proc. Amer. Phil. Soc., vol. xiv, 1876, pp. 3G4-369.

Believes the llmonlte originated from pyrite, the action possibly being aided by the
pressure of limestones.

HACHEWELDER, JOHN (W. C. Reichil, editor). Names which the
Lenni Lennapi or Delaware Indians gave to Rivers, Streams and
Localities within the states of Penn., New Jersey, Maryland and
Virginia, with their signification. Nazareth, 1872.

Trans. Moravian Hist. Soc., vol. i, Nazareth, 1876, pp. 225-282.

Originally published 1834, Trans. Amer. Phil. Soc. (title spelled differ-
ently) .

Gives the derivation and signification of some 25 local names, especially those of
rivers.

HUNT, T. STERRY. Geology of Eastern Pennsylvania.
Proc. Amer. Assoc. Adv. Sci., vol. xxv, 1876, pp. 208-212.

Considers the Blue Ridge in Maryland to be Montalban and Huronlan with no
Laurentian.

1877.

ANON. Assessed Valuation of Coal and Mining Corporations in
Allegany County, Maryland.

Eng. and Min. Jour., vol. xxiii, 1877, pp. 242.

Valuation of Maryland coal companies for 18GG and 1870 taken from the Cumberland
Alleghanian of April 3, 1877.