Notes in engineering, 3a, Harvard university (1904)
Kennedy, F[rank] L[owell] [from old catalog], Norton, Arthur Edwin, [from old catalog] joint author · Cambridge, Mass. · leaf 31
g. § (a) Cross/mfC/a«(/is used to indicate a Cross Sectionof an object drawn. (J)) It is usually drawn with the 45° Triangle.Other angles may, however, be used. (c) S2Mce lines about ^ in. apart by EYE ALONE. (d) Do not cross Figures or Arrows with hatching lines.{To avoid this the Crosshatching is… … ORDER OF \NKING-4 5fages Blocking Out Sta g e I De ve/opi og Stage Dimension Lines Stage 3
Mechanical drawing
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