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THOMPSON'S COAST PILOT. 125 Kor Making Liquid Blacking.--Four ounces of ivory black, five or six tablespoonsful of molasses, one and a half ounces oil. vitriol, one and a half ounces of sweet oil, and six gills of vinegar. After mixing the ingredients well together, and stirring them fre- quently, the blacking will be fit for use. To Make the Best Drying Oil_--Mix one pound of litharge of gold to every six gallons of oil, (linseed) ; boil it over a slow fire, but not too much, lest it prove too thick and be unserviceable. TO MARK A LEAD LINE. At two fathoms, black leather, split once; at three fathoms, black, split twice, leaving the lower end out about two inches, which forms three pieces ; at five fathoms a white rag; at seven fathoms, a red rag of bunting; at ten fathoms, a piece of leather, with a hole in it ; at thirteen, the same as three ; at-fifteen the same as five ; at seventeen, the same as seven; at twenty fathoms, two knots. - Deep sea lead lines are marked the same as far as twenty fathoms ; then add one knot for every ten fathoms, and a small strip of leather for every five fathoms. MARKS AND DEEPS OF THE LEAD LINE. Mark two, matk three, deep four, mark five, deep six, mark seven, deep eight, and nine, mark ten. : In heaving the lead, if any of the marks are even with the water's edge, the man heaving sings out whatever mark is shown, and if it is a quarter less, he says, quarter less five, or whatever it may be. If a quarter or half over any of the marks or deeps, he sings out accordingly, and a quarter five or a half five, etc. 'To heave the lead the seaman sprung, And to the watchful Pilot sung-- Quarter less five." <i % rT. 6. Visibility -- The windows of a large house can be counted about 13,000 feet or 24 miles ; men and horses at 14 miles, as points. A horse can be clearly distinguished at 4,000 feet. The movements of men at 2,600 feet, or $.a mile. An Arabic mile is when you can- not tell a man from a woman, in clear weather, with good eyes. Velocity of Wind.--A gentle, pleasant wind has a velocity of