MARYLAND GEOLOGICAL SURVEY 381

Contains: 1. Map of Maryland and the District of Columbia, colored to illustrate the
geological formations, by Philip Tyson, which see.

2. Climatological Map of Maryland, by Louis Blodget.

3. New Railroad Map of Maryland, by Frank A. Gray.

Scales: counties Allegany, 1/221760; Washington, 1/221760; Carroll and Frederick,
Baltimore and Harford, Cecil and Kent, Howard and Montgomery, and District of
Columbia, Anne Arundel and Prince George, Calvert, Charles, St. Mary's, Caroline,
Queen Anne and Talbot, Dorchester, Wicomico, Somerset and Worcester, same scale.
(Peabody.)

PETERMANN, A. Nord Amerika.

Adolf Stieler's Hand Atlas No. 77. Gotha, 1873.

10x13, colored, faintly hachured, bathymetric contours. Scale 1:25000000. (J. H. U.)

———— West-Indien in 4 Blattern. Bl. 2.

Adolf Stieler's Hand Atlas No. 80. Gotha, 1873.

16x13, outline and few towns, colored, faintly hachured. Scale 1:7500000. Neben-
karte:—Die Atlantischen Staaten zwlschen Washington und Boston. Scale 1/2000000.
(J. H. U.)

PETERMANN, A. Vereinigten Staaten von Amerika in 6 Blattern.
Bl. 3.

Adolf Stieler's Hand Atlas No. 85.

16x13, colored, faintly hachured. Scale 1/3700000. (J. H. U.)

TYSON, P. T. Map of Maryland and the District of Columbia
colored to illustrate the Geological Formations by Philip T. Tyson.
Atlas of Maryland, by Martenet, Walling and Gray, No. 15.
24x14 1/2, 24 colors. Scale 10 miles to an inch. (Peabody.)

1874.

ABERT, J. J. Map of the Country Embraced in the Surveys made
in 1838 under the direction of Col. J. J. Abert for routes for the
proposed Maryland Canal. Annapolis 1838. Reprinted Washington
Eng. Dept 1874.

28x22, outline, hachured. Scale 1 mile to an inch approximately. Includes country
between Patuxent and Monocacy rivers.

HITCHCOCK, C. H. Map of the Coal fields of the United States
compiled from State reports.

Statistical Atlas of the United States based on the results of the Ninth
Census, 1870 (etc.), plates xi and xii, folio. Washington, 1874.

HITCHCOCK (C. H.) and BLAKE (W. P.). Geological map of the
United States, compiled from the sources mentioned in the text.

Statistical Atlas (etc.), plates xiii, xiv, folio. Washington, 1874, also pub-
lished 1872, '76 and '79.

(Tyson for Md.)