Higbee, F. G · New York, John Wiley & Sons · leaf 25
ll be observed that if the profile plane be revolved sothat the portion for the third quadrant fall to the right of theV plane the profile plane for the first quadrant will, of course,revolve in the opposite way, and will be coincident with V. This 14 ESSENTIALS OF DESCRIPTIVE GEOMETRY is shown in… … Fig. II. block shown at A is projected. The P plane is revolved out ofthe way of the elevation in the same way as for the third quad-rant, thus avoiding the confusion which might result from havingthe end view superimposed upon the elevation.One of the problems constantly before the draftsman for…
Geometry, Descriptive
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![An illustration from Henry Cornelius Agrippa's Fourth book of occult philosophy, and geomancy. Magical elements of Peter de Abano. Astronomical geomancy [by Gerardus Cremonensis]. The nature of spirits [by Gorg Pictorius]. And arbatel of magic (1655)](https://img.insideoutlibrary.com/img/200/ia-cu31924006718757-218-30.webp)
