What is the government tonnage of the ship London, the keel of which is 112 feet and the beam 23 feet 7 inches? 38 feet Tons. 95ths. 15 ft. 8 ins. 5 ft. 6 ins. Single Deck 34 44 TABLES OF CORDAGE. A CORDAGE TABLE, showing how many fathoms, feet, and inches of a Rope, of any size, not more than 14 inches, make a hundred weight; with the use of the Table. At the top of the table, marked inches, fathoms, feet, inches, the first column is the thickness of the rope in inches and quarters; and the other three, the fathoms, feet, and inches, that make up a hundred weight of such a rope. One example will make it plain : Suppose you desire to know how much of a seven-inch rope will make a hundred weight; find 7 in the third column under inches, or thickness of rope, and against it in the fourth column you find 9, 5, 6, which shows that there will be 9 fathoms, 5 feet, and 6 inches, required to make up one hundred weight. Inches A TABLE, showing the weight of any Cable or Rope, of 120 fathoms in length, and for every half inch, from 3 to 24 inches in circumference. Qrs. 3 2 1 330 16 0 81 18 0 13 9 20 113 45 2 ||18 91 22 214 5 7 210 6 9 010 27 215 56 119 95 0 ||23|138 0 610 211 7 12 111 90 123 132 1 30 1151 60 0 20 100 0 24 144 0 33 0 16 64 0 USE OF THE TABLE. The first column, marked for inches, is the thickness or circumference of the cable, to every inch, from 3 to 24 inches; the second is marked cwt. qrs. for the hundred weights and quarters that it will weigh if 120 fathoms in length. For instance: Suppose it be a cable of 14 inches; look against 14, and you will find in the other column 52 cwt. 2 qrs., which shows that 120 fathoms of 14 inch cable will weigh 52 cwt. 2 qrs., and so in others; and any quantity of a less length will weigh in proportion. A ship was brought to anchor in a gale of wind; but the gale increasing, it was thought safest to cut the cables, in consequence of which 75 fathoms of 16 inches, and 50 fathoms of 12 inches were lost; what must they be valued at in calculating the average, new cordage being then 14 dollars. per cwt.? A TABLE, showing the weight of Iron Cables of 90 fathoms; and also the comparative strength of Iron and Hemp Cables. Iron. At 1 Hemp. Cwt. 17 inches, and weighs 1231 inch 107 92 78 GEOGRAPHICAL QUESTIONS. A TABLE, showing the number of miles contained in a Degree of Longitude, in each Parallel of Latitude, from the Equator to the Poles. 100ths of a mile. Degrees of Lat. Miles. 100ths of Degrees Degrees Miles. 100ths of a mile. USE OF THE TABLE. 1. How many miles are the inhabitants of Quito, near the equator, and those of St. Petersburg, in lat. 60° N. carried round by the diurnal motion of the earth? In Quito 1°—60 miles. In St. Petersburg 1°=30 miles. )21600 G. ms. 3600 Ans. 25200 S. ms )10800 G. ms. 1800 Ans. 12600 S. ms. 2. What is the distance from Charleston light-house, in long. 80° W. to Bermudas, in long. 64 W. and both in lat. 32 North. In like manner may the distance be found between the following places. From C. May, lon. 75 W. to Fayal, lon. 29 W. both in 33 N. C. Finisterre 9 42 41 3 New Haven 73 If two places be in the same longitude, the difference of their latitudes is the distance between them. Required the distance between the city of Washington, in lat. 38° N., and Lima, in lat. 12 S., both in long. 77 W. 3812° 50° X 60-3000, the distance in G. miles. |