A shorter course in woodworking; a practical manual for home and school (1911)
Wheeler, Charles G. (Charles Gardner), 1855-1946 · New York, London, G.P. Putnam's sons · leaf 233
the sap (although in living trees past their prime decay begins in the heartwoodwhile the sapwood is sound), so the more the sap can be got rid of the better. There are,however, some substances found in various trees, aside from those elements especiallyrequired for their growth, which render the… … Fig- 542 Appendix 211
Woodwork
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