=22.= =GALES.=—The figures in the center of each 5-degree square show for the month of November the percentage of days (_i. e._, the number of days in each hundred) upon which winds of force 8 and over have been recorded at some point within the given square during the eleven-year period 1897–1907. =23.= U. S. RADIO-COMPASS STATIONS Information relative to the methods for obtaining radio-compass bearings from the U. S. radio-compass stations situated on the U. S. Atlantic, Gulf, and Pacific coasts, together with a list of such stations, formerly printed on this chart, will be found in H. O. Publication No. 205 of 1927, “Radio Aids to Navigation”; price, 75 cents. * * * * * * Transcriber’s note: - Blank pages have been removed. - Obvious typographical errors have been silently corrected. - Inside cover charts and text placed at the end. - The Pilot Chart inside the back cover references an article “Fog at Sea.” on the back, this was not included in the source book.