The Operative Mechanic, and British Machinist: Being a Practical Display of the Manufactories and Mechanical Arts of the United Kingdom, Volumen2T. Desilver, jun., 1831 |
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acid antimony applied arch assay axis balusters bismuth borax brass breadth bricks calcined called carriages centre circle clay clock coat colour common constructed copal copper crucible cupel curve cylinder detent diameter draw edge ellipsis employed engine equal feet fire fixed foot frame friction frustum fusee glass glaze gold groove half heat horizontal hour inches iron joints laid laths lead length lime litharge matrass metal mixed mortar mortise and tenon motion mould moving nitrous acid pallet parallel pendulum perpendicular piece pinion placed plane plaster plaster of Paris plate pottery pounded Prob proportion quantity rafters rail railway ribs round sandarac scapement screw shaft side silver slates solid spring square steel stone stucco sufficient surface teeth tenons thickness timber tooth turpentine varnish velocity vessel vibrations wall weight wheel whole wood workman zinc
Pasajes populares
Página 261 - Find also the area of the triangle, formed by the chord of the segment and the two radii of the sector. Then...
Página 268 - ... -5236, for the content. RULE II. To 3 times the square of the radius of the segment's base, add the square of its height ; then multiply the sum by the height, and the product by -5236, for the content.
Página 259 - Or, from 8 times the chord of half the arc, subtract the chord of the whole arc, and i of the remainder will be the length of the arc, nearly.
Página 287 - Each letter or stamp must be tried as to its heat, by imprinting its mark on the raw side of a piece of waste leather. A little practice will enable the workman to judge of the heat. The tool is now to be pressed downwards on the gold leaf, which will, of course, be indented and show the figure imprinted on it. The next letter or stamp is now to be taken and stamped in like manner, and so on with the others; taking care to keep the letters in an even line with each other, like those in a book. By...
Página 264 - Multiply the circumference of the base by the slant height or length of the side, and half the product 'will be the surface.
Página 257 - Prob. 6. To find the Area of an Irregular Polygon. Draw diagonals dividing the figure into trapeziums and triangles. Then find the areas of all these separately, and their sum will be the content of the whole irregular figure.
Página 254 - Rule. — Multiply the sum of the two parallel sides by the perpendicular distance between them, and half the product will be the area.
Página 285 - ... mode of gilding. Sometimes the amalgam is applied to the surface to be gilt, without any quicking, by spreading it with aquafortis; but this depends on the same principle as a previous quicking. Grecian Gilding. — Equal parts of salammoniac and corrosive sublimate are dissolved in spirit of nitre, and a solution of gold made with this menstruum.
Página 279 - ... melted between the pieces that are to be joined. If the work be very fine, as when two leaves of a broken saw are to be brazed together...