Practical engineering drawing and third angle projection, for students in scientific, technical and manual training schools and for ..draughtsmen .. . ifc^...r)^::^,...^A whether dotting or cross-hatching — should be preceded by an undertone of either India ink,umber, Paynes gray, cobalt or Prussian blue, according to the kind of stone to be represented. ^ig-- l^ ^Lg-- i-a-S:.

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Photo credit: © The Reading Room / Alamy / Afripics
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Keywords: ., bookcentury1800, bookdecade1890, booksubjec, booksubjectlettering