1 Ton of Westmoreland slates will cover 2 squares. rag 11 to 2 1000 Duchess slates will cover 10 1000 Countess slates will cover 7 1000 Ladies slates will cover 41 1000 Doubles will cover 2; 1000 Tavistock slates will cover 23 A square of Westmoreland or Welch rag slating will weigh 10 cwt. A square of Duchess, Countess, or Ladies slating will weigh 6 cwt. ft. Welch slates, called Doubles, average 1 l by 0 6 Ladies 1 3-08 Countesses 1 8-0 10 ft. in Welch slates, called Duchesses Rags in. ft. D 2 O by 1 0 3 0-2 0 3 0 - 2 0 2 6-2 0 2 62 0 XXI.-Gravel. 27 Heaped bushels, one load. A yard cube of solid gravel, containing 18 heaped bushels before digging, will produce 27 heaped bushels when dug. XXII.—Night Soil. 18 Cube feet, one ton. 45 Cube feet, 23 tons; being the quantity contained in each load, the carts being usually made 6 feet long, 3 feet 3 inches wide, and 2 feet 4 inches deep. XXIII.-Carpenter. 100 Feet superficial, one square of boarding, flooring, &c. 50 Cube feet, one load of timber. 40 Cube feet, one ton of oak timber. 120 Deals make one hundred. 1 Hundred (120) 12 feet 24 inch deals, 9 inches wide, equal to 4 loads of timber, each deal containing I foot 10 inches cube. | Hundred (120) 12 feet 3 inch deals, 9 inches wide, equal to 5 loads of timber, each deal containing 2 feet 3 inches cube. XXIV.- Weight of Roof Covering. cwt. 1 Square pan-tiling will weigh superficial 7월 141 6 10 61 1 XXV.- Weight of Materials. tons. cwt 64 Cube feet of fir timber inches thick inches thick 24 Cube feet of sand 18 Cube feet of earth 17 Cube feet of clay 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0. 1 0 1 0 1 0 1 0 1 0 tons. cwt. 36 Cube feet of water 450 Stock-bricks 1000 Stock-bricks 1 Rod of brickwork 100 Ten-inch paving tiles 1 0 1 0 2 4 13 0 1 1 2 2 0 11 0 73 31b. 607 7 8 2 10 5 14 XXVI.—Specific Gravity and Weight of Materials. 1000 or 62 8 550 or 1 Cube foot of water 34 6 600 or 37 8 700 or 43 12 755 or 47 3 800 or 50 0 925 or 57 13 1063 or 66 7 1520 or 95 0 1793 or 112 1 1984 or 124 0 2000 or 125 0 2160 or 135 0 2500 or 156 4 Lineal or Running Measure regards only Length, but has no regard to the Breadth or Thickness. 12 Inches, one foot. 3 Feet, one yard. 5} Yards, one rod or pole. 1760 Yards, one mile. 5280 Feet, one mile. Superficial or Square Measure regards the Length and Breadth. 2724 Square feet, one square rod or pole. 43560 Square feet, or 4840 square yards, or 160 square poles, one square acre. 9 Square feet, one square yard. 0 Square feet, 1 square of flooring, tiling, slating, &c. |