A Treatise on Mensuration: Both in Theory and PracticeT. Saint, 1770 - 646 pages |
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Page 92
... circular lines , without any curve furfaces excepting that of the sphere . In the third part , which treats of folids , I have generally placed the pro- blems which relate to the meafures of the lines , furfaces , and foli dities of ...
... circular lines , without any curve furfaces excepting that of the sphere . In the third part , which treats of folids , I have generally placed the pro- blems which relate to the meafures of the lines , furfaces , and foli dities of ...
Page 93
... circular lines , viz . prisms , pyramids , the fphere , and the circular spindle . Seft . 2 .. Treats on the conic fections in general ; and , though it be hort , contains feveral things that are new and of great importance , Sect , 3 ...
... circular lines , viz . prisms , pyramids , the fphere , and the circular spindle . Seft . 2 .. Treats on the conic fections in general ; and , though it be hort , contains feveral things that are new and of great importance , Sect , 3 ...
Page 95
... circular fegments , extended to ten times the ufual length . Other tables are fuppreffed on account of the great fize to which the book hath in- . creased . t Ir may may be neceffary to remark that , in this book , where a curve or a ...
... circular fegments , extended to ten times the ufual length . Other tables are fuppreffed on account of the great fize to which the book hath in- . creased . t Ir may may be neceffary to remark that , in this book , where a curve or a ...
Page 97
... in feveral other different manners ; fuch as by the tangent , cofine , & c . of its femi - arc ; but the forms above given are the most useful ones . RULE II . If it be known what proportion it Sect . I. 97 CIRCULAR SECTOR .
... in feveral other different manners ; fuch as by the tangent , cofine , & c . of its femi - arc ; but the forms above given are the most useful ones . RULE II . If it be known what proportion it Sect . I. 97 CIRCULAR SECTOR .
Page 98
... were found to be 38 9424412. But * 785398 × 9 × 9 × 4 = the area of the circle . Therefore * This rule is too evident to need any formal proof , Therefore 360 : 38'9424412 . :: * 785398 × 9 ୨୫ Part II . CIRCULAR SECTOR .
... were found to be 38 9424412. But * 785398 × 9 × 9 × 4 = the area of the circle . Therefore * This rule is too evident to need any formal proof , Therefore 360 : 38'9424412 . :: * 785398 × 9 ୨୫ Part II . CIRCULAR SECTOR .
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Common terms and phrases
abfciffa againſt alfo Alnwick altitude angle bafe baſe becauſe bung diameter cafe cafk caſk circle whofe circular circumference cofine cone confequently content required convex furface COROLLARY correfponding cube curve furface defcribed dimenfions diſtance divided divifion ellipfe equal expreffed expreffion faid fame example fect fection feet fegment feries fhall fide figure fimilar fince find the area find the content find the folidity firſt fixed axe fluxion folid fome fpheroid fpindle fquare fruftum fubtract fuch fuppofing furface greateſt head diameter hence Hexham hoof hyperbola inches interfecting laft laſt problem lefs length linear fide meaſure middle moſt muſt Newcaſtle oppofite ordinate parabola paraboloid parallel perpendicular plane prifm prob pyramid quotient radius rule Schoolmafter ſhall ſphere ſtation theſe thofe thoſe tranfverfe trapezium triangle uſed vertex Wherefore whofe height whole whoſe wine gallons zone
Popular passages
Page 549 - AG-at 18'95, the wine and ale gage points, to make this instrument serve the purpose of a gaging rule. On the other part of this face, there is a table of the value of a load, or 50 cubic feet, of timber, at all prices, from, 6 pence to 2 shillings a foot. When 1 at the beginning of any line is accounted...
Page 427 - Ans. the upper part 13'867. the middle part 3 '605. the lower part 2-528. QUEST. 48. A gentleman has a bowling green, 300 feet long, and 200 feet broad, which he would raise 1 foot higher, by means of the earth to be dug out of a ditch that goes round it : to what depth must the ditch be dug, supposing its breadth to be every where 8 feet i Ans. 7f-| feet. QUEST. 49. How high above the earth must a person be raised, that he may see j. of its surface ? Ans. to the height of the earth's diameter.
Page 86 - ... himself closely to the measuring of them, as well as other figures. Accordingly he determined the relations of spheres, spheroids, and conoids to cylinders and cones ; and the relations of parabolas to rectilineal planes, whose quadratures had long before been determined by Euclid. He has left us also his attempts upon the circle ; he proved that a circle is equal to a right...
Page 86 - In his time the conic sections were admitted into geometry, and he applied himself closely to the measuring of them as well as other figures. Accordingly he determined the relations of spheres, spheroids, and conoids, to cylinders and cones ; and the relations of parabolas to rectilineal planes, whose quadratures had long before been determined by Euclid. He has...
Page 159 - Add into one sum the areas of the two ends, and the mean proportional between them...
Page 163 - 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.
Page 216 - An Absciss is a part of any diameter contained between its vertex and an ordinate to it; as AK or BK, • DN or EN.
Page 86 - ... triangle, whose base is equal to the circumference, and its altitude equal to the radius ; and consequently, that its area is found by drawing the radius into half the circumference; and so reduced the quadrature of the circle to the determination of the ratio of the diameter to the circumference ; but which, however, hath not vet been done.
Page 87 - T, which therefore will be nearly the ratio of the circumference to the diameter. From this ratio of the circumference to the diameter he...
Page 426 - ... to determine what number of glasses a company of 10 persons would have in the contents of it, when filled, using a conical glass, whose depth is 2 inches, and the diameter of its top an inch and a half ? Ans. 114-0444976 glasses each.