ss,consisting of a long wooden rod, having twosquare ferrules slipped over it, each with apoint below. This description of compass is adapted for describing very large circles; oneof the ferrules being fixed at the extremity ofthe beam, the other is shifted backwards orforwards according to the… … Pen. F Pencil, larger sort would be found inconvenient. Thehead of the bow compass is so constructed thatit will roll round with great ease between thefingers, g is the trammel, an instrument con-sisting of two rulers fixed at right angles to eachother, with a groove in each. A rod witli…
Design · Decoration and ornament · Art
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