Lot vintage architects/engineers/drafters technical drawing/drafting books

Lot of three vintage technical books on mechanical drawing for architects, engineers and draftsmen. There are:

"Mechanical Drawing" copyright 1947 by Ervin Kenison, James McKinney and Tom Plumridge and published by the American Technical Society. It has 330 pages with lots of illustrations and the remains of the original dust jacket. It has sections on drafting tools and instruments, symbols and conventions, projections, hidden parts, isometric projections and more.

"Mechanical Drawing - a text with problem layouts" by Thomas French and Carl Svensen. There are two copies of this book. One copy is copyright 1957 (originally copyright 1919) and the second copy is copyright 1962. These have lots of illustrations and drawings. They have sections on aircraft drafting, welding drawings, architectural drafting, sheet metal, structural and map drafting, cams and gears and much more. They have some wear.