TABLE Showing how to discover the Quantity and Weight of Water in Pipes of any given size. This table shows the quantity and weight of water contained in one fathom of length of pipes of different bores from 1 inch to 12 inches in diameter, advancing by half inch. The weight of a cubic foot of water is taken at 1000 ounces avoirdupois, and the imperial gallon at 10 lbs. Multipliers used for ascertaining the quantity of Tallow, Oakum, and Oil that can be contained in Tanks for use of Steam-vessels. Tallow, Oil, Coal, 59 lbs. in a cubic foot. Names. Specific gravity. Melting points in degrees of Fah. Contraction in parts of an inch per linear foot from the fluid to the average temp. in solid state. Ultimate cohesive ⚫strength of an in. sq. prism in tons. Scale of wiredrawing ductility. Scale of laminable ductility Ratio of hardness. PROPERTIES OF BODIES. TABLES, combining the Specific Gravities and other Properties of Bodies. PROPERTIES OF METALS.. Water the standard of Comparison, or 1000. PROPERTIES OF STONES, EARTHIS, &C. Scale as conduc tors of electricity. Ratio of power in the conduction of heat. Names. Specific gravity. Weight of a cubic foot in lbs. Cubic feet in a ton. Tons required to crush 1 in. cubes Fusing Point of various Metals. The fusing points of the more refractory substances are only to be ascertained approximately, on account of the doubtful accuracy of the indications given by the pyrometers at very high tempera tures. The pyrometer constructed of platinum is the most delicate, although the rate of its expansion must be uncertain as it ap proaches its own fusing point. The following are considered to be the fusing points of metals: Copper, 1920 Names. A dull red heat is estimated as 1480°; a bright red heat as 1830°; and a white heat as 2370° to 2910°, Fah. Axle Grease. 1. The popular axle grease of the celebrated Mr. Booth is made as follows: Dissolve lb. common soda in 1 gallon of water, add 3 lbs. of tallow and 6 lbs. of palm oil (or 10 lbs. of palm oil only). Heat them together to 200° or 210° Fah.; mix, and keep the mixture constantly stirred till the composition is cooled down to 60° or 70°. 2. Another and thinner composition is made with lb. of soda, 1 gallon of water, 1 gallon of rape oil, and lb. of tallow, or palm oil. 3. The French compound, called Liard, is thus made:-Into 50 parts of finest rape oil put part of caoutchouc, cut small. Apply heat, until it is nearly all dissolved. 4. Mankettrick's lubricating compound consists of 4 lbs. of caoutchouc (dissolved in spirits of turpentine), 10 lbs. of common imp. gallon in Fahr. 1830° 700 590 500 450 soda, 1 lb. of glue, 10 gallons of oil, and 10 gallons of water. Dis. solve the soda and glue in the water by heat, then add the oil, and lastly the caoutchouc, stirring them until perfectly incorporated. 5. The following is the ordinary kind of axle-grease in common use:-1 part of fine black lead, ground perfectly smooth, with 4 parts of lard. Some recipes add a little camphor. |