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He anſwers, That this Motion is Conical; and judgeth, that by the Conick path all the Phænomena of Comets can, without any inconveniency, be readily ſolved; even of that, which (by Hiſtory) in fifty days, paſſed through more then the 12 Signs of the Zodiack; And of that, which in two days run through eight Signs: and of another, which in 48 days poſted through all the Signs, contra ſeriem.
Shaped like a cone.
1624, Edmund Gunter, chapter XIII, in The Description and Vse of the Sector, London: Williã Jones, page 149:
IN Planes neither equinoctiall nor polar, the equator will be a right line, the tropiques and other parallels of declination will be conicall ſections, ſome of them parabolicall, ſome ellipticall, but the moſt of them hyperbolicall.
(cartography) Describing a map projection in which meridians are mapped to equally spaced lines radiating out from the apex and parallels of latitude are mapped to circular arcs centred on the apex.