MONTHLY WEATHER REVIEW. WILLIS L. MOORE, Chief U. S. Weather Bureau. VOl. 39. FEBRUARY, 191 1. No. 2. Editor, P. C. DAY, In Charge Climatological Division. District No. 1, North Atlantic States. Wilford M. Wilson, Ithaca, N. Y . District No. 2, South Atlantic and east Gt Charles F. von Herrmann, Atlanta, Ga. District No. 3, Ohio Valley. Ferdinand J. Walz, Louisville, Ky. District No. 4, Lake region. Prof. Henry J. Cox, Chicago, Ill. District No. 5, Upper Mississippi Valley. George M. Chappel, Des Moines, Iowa. District No. 6, Missouri Valley. Montrose W. Hayes, St. Louis, Mo. DISTRICT EDITORS. District No. 7, Lower Mississippi Valley. District No. 8, Texas and Rio Grande Valley. District No. 9, Colorado Valley. District No. 10, Great Basin. District No. 11, California. District No. 12, Columbia Valley. Isaac M. Cline, New Orleans, La. Bernard Bunnemeyer, Houston, Tex. Frederick H. Brandenburgj Denver, Colo. Alfred H. Thiessen, Salt Lake City, Utah. Prof. Alexander G. McAdie, San Francisco, Cal. Edward A. Beals, Portland, Oreg. df States. CONTRIBUTING CORRESPONDENTS. Summaries of weather conditions and meteorological data are contributed by the directors of the following meteorological and other services: The NIeteorological Service of the Dominion of Canada. The Central Meteorological ancl Magnetic Observatory of The Meteorological Service of Cuba. The Meteorological Observatory of Beleii College, Habana. The Government Meteorological Office of Jamaica. The Meteorological Service of the Azores. Contributions for the MONTHLY WEATHER REVIEW concern- ing agriculture, transportation, water uses ancl resources, fores- try, and similar practical subjects, should be acldressecl to the editors of the several districts interested in the subjects. The post-office addresses are a t the U. S. Weather Bureau local offices in the cities mentioned. The Meteorological Office, London. The Danish Meteorological Institute, Copenhagen, Denmark. The Physical Central Observatory, St. Petersburg, Russia. The Philippine Weather Bureau, Manila. The General Superintendent of the United States Life-Saving The Director-General of Mexican Telegraphs. Contributions for the MONTHLY WEATHER REVIEW from for- eign correspondents should be addressed to the Chief, U. S. Weather Bureau, Washington, D. C. Papers on general meteorology should also be addressed to the Chief of the Bureau. Price of a single copy, 35 cents; $4.00 per year. Foreign postage additional. District separates, 5 cents each. Mexico Service. 1. 2. 3. 1. 5. 6. ~~ CONTENTS. PART ~.--CLIMATOLOGY. Part III.-GENERAL TABLES AND CHARTS-G'O~~~~W~. I. Hydrographs of several principal rivers. 11. Tracks of centers of high areas. 111. Tracks of centers of low areas. IV. Temperature departures from the normal. VI. Percentage of clear sky between sunrise and sunset. VII. Isobars and isotherms a t sea level; prevailing VIII. Total snowfall. Climatological Summaries, 7. General Charts. ) Complete for each district; ( also issued as separates. Papers on climatology in relation to agriculture, transporta- Maps. tion, water resources, etc. PART II.-METEOROLOGY. V. Total precipitation. Weather, forecasts and warnings for the month. Rivers and floods. Special papers on general meteorology. winds. PART III.-GENERAL TABLES AND CHARTS. General Tables. I. Climatological data for U. S. Weather Bureau stations. 11. Accumulated amounts of precipitation. 111. Data furnished by the Canadian Meteorological Service. s5s39-11-1 157