The scope of in­ves­ti­ga­tion will be best described according to the following plan[N]:—

PART I.—INFLUENCE OF DIRECTION OF ELECTRIC CURRENT ON CONDUCTION OF EXCITATION IN PLANTS.

General method of experiment.

Effect of feeble current on velocity of trans­mission of excitation ‘up-hill’ or ‘down-hill.’

Determination of variation of conductivity by the method of minimal stimulus and response.

The after-effect of current.

PART II.—INFLUENCE OF DIRECTION OF ELECTRIC CURRENT ON CONDUCTION OF EXCITATION IN ANIMAL NERVE.

The method of experiment.

Variation of velocity of trans­mission under the action of current.

Variation in the intensity of transmitted excitation.