Manual of Rules, Tables & Data for Mechanical Engineers ...

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Blackie, 1878 - 984 Seiten
 

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Seite 14 - To find the area of a segment of a circle: Find the area of the sector which has the same arc, and also the area of the triangle formed by the chord of the segment and the radii of the sector.
Seite 13 - To find the perpendicular when the side is given — as radius to tangent of half-angle at perimeter (see table No. i), so is half length of side to perpendicular. Or, multiply the square of a side of any regular polygon by the corresponding area in the following table: — • TABLE No. i. — ANGLES AND AREAS OF REGULAR POLYGONS. To find the circumference of a circle. Multiply the diameter by 3 • 1 4 1 6.
Seite 191 - Gold and silver. Gold and iron. Gold and lead. Gold and copper. Gold and iridium. Gold and nickel. Silver and copper. Iron and bismuth. Iron and antimony. Iron and lead. Tin and lead. Tin and palladium. Tin and antimony. Nickel and arsenic. Zinc and antimony.
Seite 17 - RULE.* To the sum of the areas of the two ends add four times the area of a section parallel to and equally distant from both ends, and this last sum multiplied by £ of the height will give the solidity.
Seite 13 - To find the area of a triangle, multiply the base by the perpendicular height, and take half the product.
Seite 873 - ... extent of a perfect vacuum. In flowing through a nozzle of the best form, the steam expands to the external pressure, and to the volume due to this pressure, so long as it is not less than 58 per cent of the internal pressure. For an external pressure of 58 per cent, and for lower percentages, the ratio of expansion is 1 to 1.624.
Seite 12 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Seite 13 - To find the area of a trapezoid, multiply half the sum of the parallel sides by the perpendicular distance between them ; the product will be the area.
Seite 114 - British standard temperature. 212° or 100° = the boiling point, under one atmosphere. The temperature 62° F. is the temperature of water used in calculating the specific gravity of bodies, with respect to the gravity or density of water as a basis, or as unity.

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