slightly, inflected. All four thus remained for 24 hrs.
Strontium nitrate. : 22 hrs. : After 8 hrs. three leaves out of five
moderately inflected; after 24 hrs. all five in this state; but not one
closely inflected.
Aluminium chloride : 24 hrs. : Three leaves which had either been
slightly or not at all affected by the chloride became after 7 hrs. 30
m. rather closely inflected. [page 215]
Column 1 : Name of the Salts and Acids in Solution. Column 2 : Period
of Immersion of the Leaves in Solutions of one part to 437 of water.
Column 3 : Effects produced on the Leaves by their subsequent Immersion
for stated periods in a Solution of one part of phosphate of ammonia to
8750 of water, or 1 gr. to 20 oz.
Aluminium nitrate. : 24 hrs. : After 25 hrs. slight and doubtful
effect.
Lead chloride. : 23 hrs. : After 24 hrs. two leaves somewhat inflected,
the third very little; and thus remained.
Manganese chloride : 22 hrs. : After 48 hrs. not the least inflection.
Lactic acid. : 48 hrs. : After 24 hrs. a trace of inflection in a few
tentacles, the glands of which had not been killed by the acid.
Tannic acid. : 24 hrs. : After 24 hrs. no inflection.
Tartaric acid. : 24 hrs. : Do. do.
Citric acid. : 24 hrs. : After 50 m. tentacles decidedly inflected, and
after 5 hrs. strongly inflected; so remained for the next 24 hrs.
Formic acid. : 22 hrs. : Not observed until 24 hrs. had elapsed;
tentacles considerably inflected, and protoplasm aggregated.
In a large majority of these twenty cases, a varying degree of
inflection was slowly caused by the phosphate. In four cases, however,
the inflection was rapid, occurring in less than half an hour or at
197