Blessing, George F. (George Frederick), 1875-1921, Darling, Lewis A. (Lewis Andrew) · New York, J. Wiley & sons; [etc., etc.] · leaf 28
affected by changes ofweather, and which will take the thumb tacks easily and holdthem securely. Also, the board should be designed to allow for,or resist as far as possible, any change in shape due to warping orhandling. The best material for a drawing board is thoroughlyseasoned, soft, white… … Ordinary Drawing Board. central portion or body, in which part the grain should runlengthwise, and end strips so placed that the grain runs atright angles to that of the body. The body and end strips are united by a glued tongue andgrooved joint. In some instances the end strips are made ofhard…
Mechanical drawing
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