Signaling and Indian Signs 251 The most important of the signs used by men of the wil- derness are herein described. They are interesting as a crude beginning of literature. The knowledge of such things appeals to most boys. They find pleasure in learning this crudest of writing. Furthermore, many a one in the past has owed his Ufe to an inkling of this woodcraft knowledge, and there is no reason to doubt that many a wilderness traveler in the future will find it of equally vital service. WEATHER SIGNALS (Adopted for general use by the United States Signal Service on and after March i, 1887.) No. I No. 2 No. 3 No. 4 No. s White Flag Blue Flag Black Triangular White Flag White and Blue Flag Black Centre p P ^ [E |S Clear or Fair Rain or Snow Temperature Cold Wave Local Rain or Snow No. I, white flag, clear or fair weather, no rain. No. 2, blue flag, rain or snow. No. 3, black triangular flag, refers to temperature, and above Nos. I or 2, indicates warmer weather; below No. i or 2, colder weather, and when not displayed, station- ary weather. No. 4, white flag with black centre (cold wave flag), sudden fall in temperature; this signal is usually ordered at least twenty-four hours in advance of the cold wave. It is not displayed unless a temperature of forty-five degrees, or less is expected, nor is flag No. 3 ever displayed with it. No. 5, means local rain or snow; with 3 above it means with liigher temperature; with 3 below it means lower temperature. A red flag with a black centre indicates that a storm of marked violence is expected.
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