The principles of pattern making, written specially for apprentices and students in technical schools (1900)
Horner, Joseph Gregory, 1847-1927 · London, New York, Pitman · leaf 47
m ■£$ to £ in width. If the boards expana 35 36 PRINCIPLES OF PATTERN MAKING. with moisture, the width of the plate as a whole doesnot increase; the only effect of the moisture beingto partly close up these open spaces. If the boardsshrink with heat, the only effect is that the spacesincrease in… … Fig. 20. Open Joints and Ooxing-up. This figure illustrates also the method of boxing-uplarge patterns which cannot be made of solid woodwithout being unduly heavy, and without being speci-ally liable to become affected by moisture and dryness.In this illustration there are top and bottom platesA…
Patternmaking
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