Dictionarium polygraphicum, or, The whole body of arts regularly digested ..: illustrated with fifty-six copper plates . points in a line, A B,fig. 16. the points to ferve one after another as centers. As, forinfl:ance, having drawn the femicircle A B, fet one foot of thecompafies in B, and open the other to the length A B, and de-fcribe a femicircle A C ; then, fet one foot in A, take the inter-val A C, and draw the femicircle C D; and this continue aslong as you plcafc, fi:ill fhifting centers. 0/ lines and points i?i ?erspective. The terreftrial line,bafe line, or line of the plan, is the l
Dictionarium polygraphicum, or, The whole body of arts regularly digested ..: illustrated with fifty-six copper plates . points in a line, A B,fig. 16. the points to ferve one after another as centers. As, forinfl:ance, having drawn the femicircle A B, fet one foot of thecompafies in B, and open the other to the length A B, and de-fcribe a femicircle A C ; then, fet one foot in A, take the inter-val A C, and draw the femicircle C D; and this continue aslong as you plcafc, fi:ill fhifting centers. 0/ lines and points i?i ?erspective. The terreftrial line,bafe line, or line of the plan, is the line an obje6l is placed orftandsupon, of which each obje<?t has its particular one, and thewhole draught a general one. This is always parallel to the horizon, as is feen in A B ofthe firft figure of plate X, F G of the fecond, and D A of thethird ; and fometimes ferves to determine the lengths andbreadths; particularly that at the bottom of the piece, wheretoall the meafuresare to be accommodated, as will be fliewn here-after. 77/! point (f fight, poijjt of the eye, principal point, or point of I£(yr%^crn/a/ -. P(,^//j^^t/^i//jt(Z/ice, Pcunt^^St^Z/t. Pei/it^ i//jtnni:e^ H ..??- I 2. N f7 .z^. 2%^ BaJe HtT/t-x: jcn
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Keywords: ., book, bookcentury1700, booksubjectarts, booksubjectindustrialarts
