Woodwork for the grades, for use in manual training classes; fully illustrated with three hundred half-tone engravings from actual shop practice, and many working drawings of educational shop problems (1913)
Selden, Frank Henry · Chicago, Orr & Lockett Hardware Co · leaf 37
ighting for straightnessfrom end to end, may indicate that the piece is all right, andyet if you lay the piece upon a flat surface arid press down uponone corner, and then upon another, the piece may rock, or onecorner be lifted asanother is presseddown. When thepiece is not trueas tested in… … WOODWORK FOR THE GRADES 35 piece would appear if looked at from one side. These piecesare much more in wind than you are likely to get for your firsttest piece, and because of this the crookedness is quite visible inthe picture. If the piece is in wind even a very little, it must be madestraight…
Woodwork
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
