Two minutes later the right arm was pointing normally and the reaction to the left appeared. The patient made no complaint at all about the experiment.

As neither of these two great research scientists was able to find the solution to the mystery, it is small wonder that none of their contemporaries were able to do so either.

The incorrectness and weaknesses of a theory cause other minds to formulate the problems more exactly and in this way scientific progress is made.

Two minutes later the right arm was pointing normally and the reaction to the left appeared. The patient made no complaint at all about the experiment.

The investigations also proved that there were many cases of spontaneous deviation, i.e. cases where there had been no stimulation of the semi-circular canal apparatus.