THREE VALUABLE PAPERS. 



The Mutual Influence of the Stock and Graft, 



By A. A. CROZIER, of Ann Arbor, Mich. 



Diseases of Trees Likely to Follow Mechanical Injuries 



By WM. G. FARLOW, M. D., 



Professor of Cryptogamic Botany, in Harvard University, Cambridge. 



Communicability of Peach Yellows and Peach Rosette, 



By ERWIN F. SMITH, SC. D v 



Special Agent of the U. S. Department of Agriculture. 



