BIBLIOGRAPHY. 73 



110. WIEGAND, K. M. Some studies regarding the biology of buds and twigs in winter. 



Bot. Gaz., 41: 373-424, 1906. 



111. - The occurrence of ice in plant tissues. Plant World, 9: 25-39, figs. 4-5, 



1906. (Contains a very full bibliography of this subject.) 



112. WIELER, A. Untersuchungen tiber die Einwirkung schwefliger Siiure auf die 



Pflanzen, pp. 1-427, 1905. 



113. WILCOX, E. MEAD. A rhizomorphic root rot of fruit trees. Okla. Agr. Expt. Sta., 



Bui. 49: 1-32, pis. 1-11,1901. 



114. - A leaf-curl disease of oaks. Ala. Agr. Expt, Sta., Bui. 126: 171-187, 1903. 



14! I 



