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" C, to D and F, for. the circle DF ; and from A, the projecting point, draw AF/, and AD^, then df will be the tranfverfe axis of the ellipfis. But if D fall beyond the line RE, as. at G,. then: draw. a fine from G backward thro' A to D, and then df is... "
Cyclomathesis: Or, An Easy Introduction to the Several Branches of the ... - الصفحة 42
بواسطة William Emerson - 1769
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The projection of the sphere, orthographic, stererographic, and gnomonical ...

William Emerson - 1769 - عدد الصفحات: 86
...line from G backward thro* A to D, and then df^s' the tranfverfe of an hyperbola. But if the point E) fall in the line RE as at E, then the line AE nowhere meets the line of meafures^ and the projection of E is at'an'infinite diftance, 'and then the...

Tracts: Containing: I. Mechanics, Or the Doctrine of Motion: II.

William Emerson - 1793 - عدد الصفحات: 386
...of the ellipfis. But if D fall beyond the line RE, as at G, then draw a line from G backward through A to d, and then df is the tranfverfe of an hyperbola....an infinite diftance, and then the circle will be projecled into a parabola whofe vertex is/ Laftly, bifedt df'm H the center, and for the ellipfis take...

A Popular Course of Pure and Mixed Mathematics ...: With Tables of ...

Peter Nicholson - 1825 - عدد الصفحات: 1046
...line RE, as at G, then draw a line from G backward through A to D, and then •//'is the major axil of an hyperbola. But if the point D fall in the line RE, as at Б, then the line АБ meets the line of measures no where, and the projection of E is at an infinite...

A London Encyclopaedia, Or Universal Dictionary of Science, Art ..., المجلد 18

Thomas Curtis - 1829 - عدد الصفحات: 804
...RE, as at G, then from G draw the line GAD rf, and <f/ is the transverse axis of an hyperbola : and if the point D fall in the line RE, as at E, then the line AE will not meet the line of measures and the circle will be projected into a parabola whose vertex is...

The London encyclopaedia, or, Universal dictionary of science ..., المجلد 18

Thomas Curtis (of Grove house sch, Islington) - 1839 - عدد الصفحات: 814
...RE, as at G, then from G draw the line GAD d, and df is the transverse axis of an hyperbola : and it the point D fall in the line RE, as at E, then the line AE will not meet the line of measures and the circle will be projected into a parabola whose vertex is...




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