(112

(I tried a few other salts, but they were only these experiments are worth mentioning only as showing that some others at other salts like some of those of Potash, & unlike those of ammonia & soda, do not cause inflection. Solutions of Sulphate of magnesia of 2 two grains & of one grain to the ounce were tried on ten leaves & produced no effect, excepting that one seemed injured by the stronger solution. Similar solutions of alum (Sulphate of alumina & potash) was tried one nine leaves & produced no effect. A solution of two grains of nitrate of lime to one ounce was tried on three leaves with the same negative result.)

(The chief point of interest is the few foregoing experiments in the with several, salts in that the nature of the acid seems quite unimportant in comparison with that of the base.

We see this clearly in the case of ammonia, & almost as clearly with in the case of the salts of soda & potash & soda. All the salts of the latter cause, that in different degrees, the tentacle to become inflected & often the laminæ of the leaves, more especially in the case of the