Efficiency of steam-pipe conduits . /2-inch layer of magnesia plasterbetween, the 1-inch coverings being wired on so as to breakjoints; finished with eight-ounce canvas. 19. Two-inch covering composed of 8b per cent carbonateof magnesia put on in two 1-inch layers placed so as tobreak joints; finished with eight-ounce canvas. 20. Solid 2-inch moulded sectional covering composed of85 per cent magnesia, covered with canvas which was pastedon; finished with eight-ounce canvas. 21. Solid 2-inch moulded sectional covering composed of85 per cent magnesia, covered with canvas which was pastedon; fini
Efficiency of steam-pipe conduits . /2-inch layer of magnesia plasterbetween, the 1-inch coverings being wired on so as to breakjoints; finished with eight-ounce canvas. 19. Two-inch covering composed of 8b per cent carbonateof magnesia put on in two 1-inch layers placed so as tobreak joints; finished with eight-ounce canvas. 20. Solid 2-inch moulded sectional covering composed of85 per cent magnesia, covered with canvas which was pastedon; finished with eight-ounce canvas. 21. Solid 2-inch moulded sectional covering composed of85 per cent magnesia, covered with canvas which was pastedon; finished with eight-ounce canvas. The factor which workmanship plays in making the joints is shown in the variation of efficiency of coverings No. 3 and 5,and also in So. 20 und 21 which are made in a similar manner, respectively. The variation was found to be due to the care with which the covering was applied. It is also interesting to note that the efficiency of the magnesia EFFICIENCY OF PIPE C01/EFING5 Electrical Test-H& Z.€ SO MEAT per of F//oc Surface per M/n. A. Corresponding gauge steam pressure in lb. per sq. Corresponding temperature in degrees Fahrenheit. C Percentage increase of resistance of pipe. Jig. IE. 30 covering varies as the square root of its thickness; butthe other materials vary according to other factors. b. Nortons Electrical method was advanced by Prof. and is de-scribed in the Transactions of the American Society ofLlechanical Engineers, Vol. 19. The apparatus for making the test was set up as shownin Jig. 13. The pipe was heated by means of a wire coil inan oil bath, ^he oil was circulated by means of a stirringrod and served as a very efficient heater. A piece of 4-inch pipe, IB inches long, is closed atone end by a plate welded in, and at the other by a tight-ly fitting cover. This pipe is then filled with cylinderoil, and a coil of wire of sufficie
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1913
