enforcement officers. Hatcheries for commercial fishes, the yellow
perch, and the shad, are provided at Severn Run and Charlestown,
while in cooperation with the U. S. Fish and Wildlife Service, shad
hatchery activities are supported on the Potomac River. Fry are pro-
vided for all major tributaries and streams in the State. The State
Weather Service is a joint project of the Federal government and the
State. It provides pertinent and useful information to the general
public, especially to the farmers and to air and water transportation
interests. Headquarters for the Service are in the U. S. Custom
House, Baltimore. In furthering this work, periodic and special pub-
lications are issued.
Publications: Nash, Carroll B., Environmental Characteristics.

of a River Estuary. 1947..

Morse, Dorothy Clum. Some Observations on Seasonal Vari-
ations in Plankton Population, Patuxent River, Maryland,
1943-1945. 1947.
Cronin, Lewis Eugene. Anatomy and Histology of the Male.

Reproductive System of Callinectes sapidus Rathbun. 1947.
Thompson, R. H. Fresh-Water Dinoflagellates of Maryland..

1947..

Beaven, G. Francis. Effect of Susquehanna River Stream
Flow on Chesapeake Bay Salinities and History of Past
Oyster Mortalities on Upper Bay Bars. 1947.
Hammer, Ralph C. Maryland Commercial Fish Hatchery.

Operations. 1946..

Kaylor, Joseph F. Trees of Maryland. 1946.
Bennett, Robert R. Ground Water in the Baltimore Area,.

Maryland, 1946..

Miller, T. M. Utilisation of Marine Products. 1947.
Coker, Coit M. Maryland Commercial Fish Hatchery Opera-
tions. 1947.
Annual Report. 1946,1947.
Maryland Tidewater News (monthly)..

1948 1949
Appropriations $90,697 $93,292
Staff: 18..

WATER POLLUTION CONTROL COMMISSION.

Chairman: Joseph H. McLain, 1953.

Ex-officio Members: Robert H. Riley, Director, Depart-
ment of Health; John E. Clark, Chairman, Board of Natural
Resources; R. V. Truitt, Director, Department of Research
and Education; Ernest A. Vaughn, Director, Department of
Game and Inland Fish..

Appointed Members: Shepperd T. Powell, 1951; Frank C.
Wachter, 1949..

Paul W. McKee, Executive Secretary
Guy E. Lerner, Chemist
John G. Walters, Chemist.

Court, of Appeals Building, Annapolis Telephone: Annapolis 9176
The Johns Hopkins University, Baltimore Telephone: Belmont 3654
The Water Pollution Control Commission was created in 1947 as a
result of the recommendation of the temporary Committee on Water.