w on the plane,drawing right lines through the center and the termes ofthefe chords, fo the line B H (hall be the horizon, and hisperpendicular B V the axis of the horizon, and the reft thelines of altitude, according to their diftance from the ho-rizon. That done, confider your plane,which here… … 3 is the line between B the top of the ftyle and V the verticallpoint, tnd pricke that downe in this figure from B vnto V;then take out both the line VH and all the reft of the distan-ces between V the verticall point and the feuerall pointswherein the verticall lines doe erode the horizontall line…
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![An illustration from Clariss[imi] pictoris et geometræ Alberti Dureri, De varietate figurarum et flexuris partium ac gestib[um] imaginum, : libri duo, cqui priorib[us] De symmetria quondam editis, nunc primum in latinum conversi accesserunt (1534)](https://img.insideoutlibrary.com/img/200/ia-clarissimipictor00dure-9-1.webp)
