1883. | Botany. 971 
taric, citric, tannic, and salycylic. The experiment began June 
22, 1882, and lasted until September 6. The strength of acid so- 
lutions was 10% of acid, concentrated in case of the inorganic 
acids, and saturated cold solutions of the organic acids, in one 
of hydrochloric, nitric, and sulphuric acids, used to water the 
plants was reduced one-half. The behavior of these plants in de- 
eae as follows, the plants being classed according to the acid 
used + 
June 25. July 13. Aug. 24. 
Hydrochloric... 6 full leaves. 6 full leaves; stunted. 5 full leaves. 
PS rt e « gen) S “ ote 
Carbolic....... A e “ 2 “ e s None. 
Orne) 4 “ “ 6 “ 7 “ 5 full leaves. 
Salycylic a p RRO ar 6 « sé 7 “ “ growing. 4 “ “ 
Sulphuri A RRA Ab Ea A a “ gn “ stunted. 26 “ 
bare... | yoa, a 9* « growing. 9* “ 
Tannic Hp Palit 6 « a g“ e e 9 * “ 
rites “sce ee o n “ ras ay “ ye 
Water... 2.05; ir 4 “ 13 “ t i 7 “ ‘ 
From the first day of the experiment the first six plants, with 
€ exception of the salycylic, were unfavorably affected by the 
acids used, but maintained a deceptive appearance of vitality by 
curtailing their expenditure of force in growing and applying it 
upon a maintenance of leaves. The doses appeared severe, but 
none of them died excepting the carbolic-acid plant, which very 
the sulphuric-acid plant was the most thriving, then the hydro- 
chloric-acid plant, and last, and just alive, the plant treated with 
formic acid. : 
VOL. XVII.—No. 1x, 65 
