Exercises in wood-working, with a short treatise on wood; (1890)
Sickels, Ivin. [from old catalog] · New York, D. Appeton and company · leaf 20
nner bark. Inthe spring growth the vessels are large and numerous; inthe autumn they are much smaller, and in some cases maybe absent. By this variation in the size and position of thebundles the annual rings become distinctly marked. Themedullary rays in the heart-wood vary in thickness, and… … Composition of Wood. Newly formed cells have the wall composed of cellulose, asubstance similar to starch in composition. The contents ofthe cell are made up of a number of substances, the chief ofwhich are albuminoids, starchy matters, oils, and water withdissolved sugars, gums, and acids. In the…
Woodwork (Manual training) · Wood
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