Volume I, containing Bulletins 1-5 $1.50 Volume II, containing Bulletins 6-12 2.45 Volume III, containing Bulletins 13-15 2.50 Volume IV, containing Bulletins 16-21 2.15 Volume V, containing Bulletin 22 2.50 It is intended to follow a liberal policy in gratuitously distributing these publications to public libraries, colleges, and scientific institutions, and to scientific men, teachers, and others who require particular bulletins for their work, especially to those who are citizens of Connecticut. Applications or inquiries should be addressed to ~George S. Godard~, _State Librarian_, Hartford, Conn. In addition to the bulletins above named, published by the State survey, attention is called to three publications of the United States Geological Survey prepared in co-operation with the Geological and Natural Survey of Connecticut. These are the following: Bulletin 484. The Granites of Connecticut: by T. Nelson Dale and Herbert E. Gregory. Water-Supply Paper 374. Ground Water in the Hartford, Stamford, Salisbury, Willimantic and Saybrook Areas, Connecticut: by Herbert E. Gregory and Arthur J. Ellis. Water-Supply Paper 397. Ground Water in the Waterbury Area, Connecticut: by Arthur J. Ellis, under the direction of Herbert E. Gregory. These papers may be obtained from the Director of the United States Geological Survey at Washington. CATALOGUE SLIPS. _=Connecticut.= State geological and natural history survey._ Bulletin no. 30. Drainage Modifications and Glaciation in the Danbury Region, Connecticut. By Ruth S. Harvey, Ph.D. Hartford, 1920. 59 pp., 5 pls., 10 fig., 25cm. =_Harvey, Ruth Sawyer, Ph.D._= Drainage Modification and Glaciation in the Danbury Region, Connecticut. By Ruth S. Harvey, Ph.D. Hartford, 1920. 59 pp., 5 pls., 10 figs., 25cm. =_Geology._= Harvey, Ruth S. Drainage Modifications and Glaciation in the Danbury Region, Connecticut. Hartford, 1920. 59 pp., 5 pls., 10 figs., 25^cm. State of Connecticut PUBLIC DOCUMENT No. 47 State Geological and Natural History Survey HERBERT E. GREGORY, SUPERINTENDENT BULLETIN No. 30 ~Hartford~ Printed by the State Geological and Natural History Survey 1920 State Geological and Natural History Survey COMMISSIONERS ~Marcus H. Holcomb~, Governor of Connecticut ~Arthur Twining Hadley~, President of Yale University ~William Arnold Shanklin~, President of Wesleyan University ~Remsen Brickerhoff Ogilby~, President of Trinity College ~Charles Lewis Beach~, President of Connecticut Agricultural College ~Benjamin Tinkham Marshall~, President of Connecticut College for Women