ABSTRACT
A technique for measuring the elastic value of living protoplasm is described.
An elastic value of the cortical layer of the protoplasm of the Echinarachnius egg is given.
The presence of an elastic property in protoplasm is incompatible with the emulsion hypothesis of protoplasmic structure.
The magnet used was wound for the writer by the Trenton Office of The General Electric Co. through the courtesy of the resident agent Mr L. S. Harrison, to whom the writer is indebted for the assistance rendered.
This research was carried on at the Mt. Desert Biological Laboratory, Maine, where the writer enjoyed the privileges of a research room through the courtesy of the Director, Professor Ulrich Dahlgren, to whom thanks are due.
That the magnetic force is inversely proportional to the square instead of the cube of the distance is true here, because the distance between particle and magnet is greatly in excess of the distance between the poles of the magnet.
