. Haswell's engineers' and mechanics' pocket-book ... ice the diameter ef at i of its length ; multiply the sum by thelength, and the product by .1309, and it will give the solidity nearly. To find the Solidity of a Frustrum or Segment of an Elliptic Spindle— fig. —Proceed as in the last rule for this or any other solidformed by the revolution of a conic section about an axis, viz.: Addtogether the squares of the greatest and least diameters, , andthe square of double the diameter in the middle, between the two ;multiply the sum by the length ef and the product by .1309, and itwil
. Haswell's engineers' and mechanics' pocket-book ... ice the diameter ef at i of its length ; multiply the sum by thelength, and the product by .1309, and it will give the solidity nearly. To find the Solidity of a Frustrum or Segment of an Elliptic Spindle— fig. —Proceed as in the last rule for this or any other solidformed by the revolution of a conic section about an axis, viz.: Addtogether the squares of the greatest and least diameters, , andthe square of double the diameter in the middle, between the two ;multiply the sum by the length ef and the product by .1309, and itwill give the solidity. Note.—For all such solids, this rule is exact when the body is formed by the conic•action, or a part of it, revolving about the axis of the section, and will always bevery near when the figure revolves about another line. * The area of the frustrum can be obtained by dividing its central plane into seg-ments of a circle, and triangles or parallelograms. H 86 MENSURATION OF SOLIDS. OF PARABOLIC CONOIDS AND
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Keywords: ., bookcentury1800, bookdecade184, booksubjectmechanicalengineering
