NOTE.—Contains on reverse, Direction and percentage of prevailing winds at stations on Great Lakes during July, 1900-09.—Approximate location of submarine signal bell stations, Apr. 1913.—Distribution of radio stations on Great Lakes, and call letters for each.—Highest velocity of wind, direction, and date of occurrence, during July, 1900-12.
The meteorological charts and supplements of the north Atlantic, north Pacific, and Indian oceans, and tbe Great Lakes, monthly, and of the south Atlantic and south Pacific oceans, quarterly, are issued by the Weather Bureau for gratuitous distribution to cooperating shipmasters and others interested in ocean meteorology.