Sinopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1856 Excerpt: ...together 8 parts of resin, 1 of wax, and stir in 4 parts, or as much as may be required, of Paris plaster. The pieces to be made hot. HensWs Cement--Grind 3 parts.of litharge 2 of recently burnt lime, and 1 of white bole, with linseed oil varnish. This is a very tenacious cement, but it takes considerable time to dry. Singer's Cement, for Electrical Machines and Galvanic Troughs.--Melt together 5 lbs. of resin, and 1 lb. of beeswax, and stir in 1 lb of red ochre (highly dried, and still warm), and 4 oz. of Paris plaster, continoiinff the heat a little above 212, and stirring constantly till all frothing ceases. Or (for troughs), resin, 6 lbs; dried red ochre, 1 lb.; calcined plaster of Paris,-lb.; linseed oil, £ lb. Composition for welding Cast S,---Take of borax, 10 parts, sal ammoniac, 1 part; grind or pound them roughly together; then fuse them ma metal pot over a clear fire, taking care to continue the heat until all spume has disappeared from the: surface. When the liquid appears clear, the composition is ready to be poured out to cool and concrete; afterwards,..being ground to a fine powder, it is ready for use. " To use this composition' The steel to be welded is first raised to a "bright yellow" heat, it is then dipped among the welding powder, and again placed in the fire, Until it attains the same degree of heat as before; it is then ready to be placed under the hammer. Cast-iron demenl-r-liake of clean iron borings, or turnings, 1 cwt.; of sal-ammoniac 8 oz.; and 1 oz. of flour of sulphur. Mix them thoroughly, and add sufficient water. If the cement is not to be immediately used, care should be taken to keep the mixture soaked in water; if left dry, the cement will heat, and be spoiled. Cement for Steam Pipe Joints, &c, wi...
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Reseña del editor
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1856 Excerpt: ...together 8 parts of resin, 1 of wax, and stir in 4 parts, or as much as may be required, of Paris plaster. The pieces to be made hot. HensWs Cement--Grind 3 parts.of litharge 2 of recently burnt lime, and 1 of white bole, with linseed oil varnish. This is a very tenacious cement, but it takes considerable time to dry. Singer's Cement, for Electrical Machines and Galvanic Troughs.--Melt together 5 lbs. of resin, and 1 lb. of beeswax, and stir in 1 lb of red ochre (highly dried, and still warm), and 4 oz. of Paris plaster, continoiinff the heat a little above 212, and stirring constantly till all frothing ceases. Or (for troughs), resin, 6 lbs; dried red ochre, 1 lb.; calcined plaster of Paris,-lb.; linseed oil, £ lb. Composition for welding Cast S,---Take of borax, 10 parts, sal ammoniac, 1 part; grind or pound them roughly together; then fuse them ma metal pot over a clear fire, taking care to continue the heat until all spume has disappeared from the: surface. When the liquid appears clear, the composition is ready to be poured out to cool and concrete; afterwards,..being ground to a fine powder, it is ready for use. " To use this composition' The steel to be welded is first raised to a "bright yellow" heat, it is then dipped among the welding powder, and again placed in the fire, Until it attains the same degree of heat as before; it is then ready to be placed under the hammer. Cast-iron demenl-r-liake of clean iron borings, or turnings, 1 cwt.; of sal-ammoniac 8 oz.; and 1 oz. of flour of sulphur. Mix them thoroughly, and add sufficient water. If the cement is not to be immediately used, care should be taken to keep the mixture soaked in water; if left dry, the cement will heat, and be spoiled. Cement for Steam Pipe Joints, &c, wi...
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