Philosophical transactions of the Royal Society of London (1686)
Royal Society (Great Britain) · London : Royal Society of London · leaf 275
to, the conditions of the five Conical Sections. i Firft if i it be found that” rs = % aires 45 equal to: = | A Tm aa i Ub, then it is the Char acteriftic of a Circle, the à Lines a, [x 6 being: dif fpofed ; in an uniform incres(ing. onder i But ifc the biggeft ftands in the middle, than * d gis y… … | little variety inthe cafe. , when the given lines are in the fame , Quadrant or otherwife : but Pe _ only occafion for this à fiit Cafe ,the Rule is this , “ tp Eo pon 20r. af am, fs bb T 2¢¢= Radius. Wc s d b -- b ni | pn sina girs having 4 ,2,d ande ,tofindc: The ee | | iz dri M | Rques A CUP
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