The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, and General Literature, 6. köideThomas Spencer Baynes C. Scribner's Sons, 1878 |
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Page 1
... tangent of the obliquity of the ecliptic , or of 23 ° 28 ' , to the cotangent of the latitude . The semidiurnal arcs are assumed to be 91 ° 52 ' , 93 ° 45 ' , 95 ° 37 ' , 97 ° 30 ' , & c . , and the following table , extracted from ...
... tangent of the obliquity of the ecliptic , or of 23 ° 28 ' , to the cotangent of the latitude . The semidiurnal arcs are assumed to be 91 ° 52 ' , 93 ° 45 ' , 95 ° 37 ' , 97 ° 30 ' , & c . , and the following table , extracted from ...
Page 33
... tangent to the cam at both their points , and that in no part of the motion should the end of the lever scrape on the cam . In the common construction of clocks the first con- dition is deviated from as far as possible , by the striking ...
... tangent to the cam at both their points , and that in no part of the motion should the end of the lever scrape on the cam . In the common construction of clocks the first con- dition is deviated from as far as possible , by the striking ...
Page 274
... tangent at P. A line through P at right angles to the tangent is called the normal at P. PROPOSITION I. To find where a parabola of given focus and directrix is cut by a straight line parallel to the directrix . Let S ( fig . 2 ) be the ...
... tangent at P. A line through P at right angles to the tangent is called the normal at P. PROPOSITION I. To find where a parabola of given focus and directrix is cut by a straight line parallel to the directrix . Let S ( fig . 2 ) be the ...
Page 275
... tangent at Q is paral- lel to PP ' , and OV will be bisected in Q. Draw the tangent RQR ' at Q , eeting OP , OP in R , R ' . Join Q , and let RW be drawn paral · to OQV meeting PQ in W. Then PW - WQ ( Prop . viii . ) herefore OR = RP ...
... tangent at Q is paral- lel to PP ' , and OV will be bisected in Q. Draw the tangent RQR ' at Q , eeting OP , OP in R , R ' . Join Q , and let RW be drawn paral · to OQV meeting PQ in W. Then PW - WQ ( Prop . viii . ) herefore OR = RP ...
Page 276
... tangent , and normal are defined exactly in the same words as in the case of the parabola . PROP . I. To find where an ellipse of given focus , directrix , and eccentricity is cut by a straight line parallel to the directrix . Let S ...
... tangent , and normal are defined exactly in the same words as in the case of the parabola . PROP . I. To find where an ellipse of given focus , directrix , and eccentricity is cut by a straight line parallel to the directrix . Let S ...
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afterwards ancient angle appears arbor axis beetles British called centre century church clock coal measures coal-field coast cobalt Cochin Cochin China coffee coke Coleridge colony colour comet common companies Condé Condillac Confucius considerable Constantine constitution consuls contains Convocation court Crown diameter directrix district ellipse elytra emperor England English escapement Europe exports extended feet France French Government gravity escapement House important inches India iron island king known labour land larvæ latter length less lignite London means miles millstone grit native observed obtained pallet parabola Parliament passed pendulum perihelion pinion population prince of Condé principal produced PROP province remarkable remontoire river Roman Rome royal scape-wheel seams side society species square miles strata surface tangent teeth temperature thickness tion Tong-king town trade weight wheel whole