Smithsonian Report, 1926.—Coville PLATE 8 
RESUSCITATION OF A SICKLY FRANKLINIA THROUGH TREATMENT WITH 
ALUMINUM SULPHATE 
The plant at the left was almost dead from five months’ contact with an ordinary fertile but 
neutral garden soil. The plant at the right was in the same soil for the first eight weeks 
and became sickly like the other. It was then given an application of aluminum sulphate, 
which changed the soil reaction from neutral to acid. After three months’ contact with the 
acid soil the plant had recovered its health and resumed normal growth ,as shown in the 
illustration A bout one-third natural size 
