- VOLUME LV NUMBER 6 
THE 
BOTANICAL GAZETTE 
FUNE 1913 
TOXIC INORGANIC SALTS AND ACIDS AS AFFECTING 
PLANT GROWTH 
(PRELIMINARY COMMUNICATION) 
CuHas. B. LIPMAN AND FRANK H. WILSON 
The economic and industrial phases of the smelter fume and 
smelter waste problem, especially as related to crop growing in the 
vicinity of smelters, have been accompanied by a revival of interest 
In the scientific aspects connected with the physiological effects 
of the metallic compounds of copper, lead, zinc, and others on plant 
_ growth. There have appeared in 1905, 1908, and 1910, respectively, 
Bulletins 89, 113, and 113 revised, of the Bureau of Chemistry of 
_ Zanese in soils and its effects on plants, that led the authors to 
_ institute the preliminary experiments which are described below. 
. Before reporting these, however, it is of interest to turn for a 
_ Moment to a brief review of the results thus far obtained by plant 
