By-Products
Any object as juicy and colorful as a black walnut hull may well become a subject for search in recovery of by-products. The thermally active carbon made from the shells has actuated laboratory thermostats for me for several years.
But more real and immediate by-products have been the personal associations which have arisen from this hobby. Physicians, engineers, teachers, farmers, persons from every calling are among those whom I have met through a common interest in nut tree propagation. I can recommend this hobby to anyone mature enough to take an interest in the future, and to chemists in particular.
Bibliography
1. W. NEILSON JONES Plant Chimaeras and Graft Hybrids Methuen and Company, London
2. SHEAR-LANOLIN As a Wound Dressing for Trees Proc. Am. Soc. Hort. Sci. 34, 286-8 (1937)
3. HORNER, KOPPA and HERBST—Mercurial Fungicide Wax Problems Ind. Eng. Chem, 37 1069-73 (1945)
4. U. S. BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE—E-409—June 1937. A method for preventing insect injury to material used for posts, poles, and rustic construction.
5. E-434—May 1938, An efficient method for introducing liquid chemicals into living trees.
6. E-467—February 1939, Chemicals and methods used in treatments of trees by injections, with annotated bibliography.