Ice thickness measurements were made at 22 stations along the coasts of eastern Canada and southern Greenland and on nearby lakes and rivers during the period 1943 through 1951. This report provides a tabulation which exemplifies the type of ice thickness data collected and descriptions of surface conditions during ice formation, growth and decay. Maximum observed ice thicknesses ranged from 31 inches at Presque Isle, Maine to 94 inches in Sondre Strom Fjord, Greenland. Least ice thicknesses at the end of the growth season ranged from 15 inches at Presque Isle to 47 inches at Cape Dan, Greenland. This report also gives the average number of days of ice cover for all stations. It ranged from about 100 days in southern Newfoundland to about 250 days in northern Baffin Island.