The boys' book of engine-building; . ver costs25 cents while a j^-inch safety valve with a ^-inch steampassage and a 6-inch lever sells for 35 cents. Note.—The prices listed ahove are those quoted by the manu-facturers at the time this book was written. Since these arewar-times the prices are subject to change but I here give themso that you can at least judge the relative value of the differentparts. Where to Buy Engine Fittings.—Write for cataloguesand price-lists to Arthur H. Wightman, 132 Milk Street,Boston, Mass.; The Chicago Model Works, MadisonStreet, Chicago, 111.; Spon and Chamberlin,
The boys' book of engine-building; . ver costs25 cents while a j^-inch safety valve with a ^-inch steampassage and a 6-inch lever sells for 35 cents. Note.—The prices listed ahove are those quoted by the manu-facturers at the time this book was written. Since these arewar-times the prices are subject to change but I here give themso that you can at least judge the relative value of the differentparts. Where to Buy Engine Fittings.—Write for cataloguesand price-lists to Arthur H. Wightman, 132 Milk Street,Boston, Mass.; The Chicago Model Works, MadisonStreet, Chicago, 111.; Spon and Chamberlin, 123 Lib-erty Street, New York City, and the Weeden Toy En-gine Company, New Bedford, Mass. APPENDIX E Speed Indicators.—A Simple Way to Find the Speedof a Crankshaft.—To find the speed that a shaft or awheel is turning is simple if you have a speed consists of a spindle on which threads are cut forming aworm gear and this meshes with a gear to which thedial is fixed. 6000EU P(?ATT Covswiy_ ; Fig. 84. A Speed Indicator By pressing the pointed end of the speed indicatoragainst the center of the wheel or shaft the spindle turnsthe dial around and the number of revolutions can thenbe read off by timing it with a watch. INDEX Air pressure on piston, 6 Airplane engine, 23 Alcohol lamp, easily made, 29 Alloys, 243 Appendices, 247 Atlantic type of locomotive, 138Atmosphere defined, 189Atmospheres, steam measured in, 189Atmospheric engine, 6Automobile engine, 23Automobile, steam, 16Auxiliary parts of a horizontal steam engine, 88 Babbitt metal, 235 Ball governor, 120 Bearings for shaft of modelturbine, 40 Bed plate for a horizontalsteam engine, 70 Bed Plate, mounting engine onthe, 86 Bed, setting engine on its, 86 Beighton, Henry, 9 Bell frame for locomotive bell,142 Bell for a locomotive, 142 Beveled gears, 229 Blades, action of steam on tur-bine wheel, 43 Blades, making steam turbine, 33Boil, how water is made to, 185Boiler, a %2 h. p. vertic
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