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THOMPSON'S COAST PILOT. 139 computation of a ship's way depends much upon the accuracy of this allowance, it would be proper for the officer of the watch to note this onalog slate every four hours. The lee way may be estimated by observing the angle which the wake of the vessel makes with the point right astern, by means of a semi-circle marked on the taffrail, and divided into points and quarter points, by means of which the angle contained between the direction of the wake and the points of the compass directly astern, may be easily ascertained. The lee way thus deter- mined is to be allowed on all courses steered to the right hand, when the port tacks are aboard, but to the left when the star- board tacks are aboard. HOW TO JUDGE WEATHER BY THE SKY. The color of the sky, at particular times, affords wonderfully good guidance. Not only sunset presages fair weather, but there are other tints which speak with equal clearness and accu- racy. A bright yellow sky in the evening indicates wind; a pale yellow, wet; a neutral gray color constitutes a favorable sign in the evening and an unfavorable one in the morning. They are full of meaning in themselves. If their forms are soft, underlined and feathery, the weather will be fine; if the edges are hard, sharp and definite, it will be foul. Generally speak- ing, any deep, unusual hues betoken wind and rain; while the more quiet and delicate tints bespeak fair weather. Simple as these maxims are, the British Board of Trade has thought fit to publish them for the use of seafaring men. , RECIPES FOR BLACKING, SHIPS' STANDING RIGGING. To half a barrel of tar add six gallons of whisky, four -- pounds of litharge, four pounds of lamp black, two pails of boiling beef pickle, or hot salt water; mix well together and apply immediately. -- For Maxine Buack Varniso, No 1.--Two pounds of gum shellac, two pounds of umber, one gallon linseed oil, and a quarter pound of lamp black ; boil together for four hours over a slow fire. : For Maxine Brack Varnisu, No. 2.,--One gallon spirits tur- pentine, one pound and four ounces of rosin, oné pound and