Smith, David Eugene, 1860-1944 · Boston, New York [etc.] Ginn and Company · leaf 249
ated, afew illustrations are here given, showing the old instru-ments and methods used in practical surveying beforethe eighteenth century. The illustration on page 236 shows a simple form ofthe quadrant, an instrument easily made by a pupil who 238 THE TEACHING OF GEOMETRY may be interested in… … A Quadrant of the Seventeenth CenturyBartolis Del niodo di misurare, Venice, 1689 Another type, easily made by pupils, is shown in theabove illustration from Bartoli, 1689. Such instrumentswere usually made of wood, brass, or ivory.2 Instruments for the running of lines perpendicular toother lines…
Geometry
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