Title: Survey of Northern and Northwestern Lakes. April 1938. War Department Corpsof Engineers. Bulletin No. 47.
Publisher:  U.S. Lake Survey Office, Detroit, Mich., 1938,
Seller ID: 88844
(Great Lakes). Survey of Northern and Northwestern Lakes. April 1938. War Department Corps of Engineers. Bulletin No. 47. Detroit, Mich.: U.S. Lake Survey Office, (1938). Pp -488,+ 2 folding tables. Index. Large 8vo, tan printed card covers. To supplement the information given upon the charts of the Great Lakes and issued with those charts from the U.S. Lake Survey Office, Detroit, Mich. The bulletin supersedes all previous bulletins for the above-named waters. The Great Lakes, their harbors, channels, and navigable tributaries. Contents : Preface – Lake Survey Organization and Duties; Aidsto Navigation; Radiobeacon Stations; Publication Dates of Lake Survey Char ts; Distance Tables for the Great lakes; Conversion Table – Compass Point to Azimuth; Tables of Azimuths of Ranges; The Compass and the Earth's Magnetism in the Lake Region; Signals for the Opening of Drawbridges; Storm-Warning Display Stations; Coast-Guard Stations; Extracts from laws of the UnitedStates; Regulations for Display of Signals On and Operations of Working Pl ant; Regulations Governing Length of Towlines; Lake Superior; St. Mary's River; Lake Michigan; Lake Huron; St. Clair River; lake St. Clair; Detroit River; Lake Erie; Niagara River above Niagara Falls; Niagara River below Niagara Falls; New York Canals, Hudson River, and Lake Champlain; Lake Ontario;St. Lawrence River. Spine torn, covers and title page soiled and partly de tached, a poor, reading copy only. As is. 25.00