Electrical measurement of physical values

J. R. Craighead: Mr. Borden has had a very difficult task because of the fact that it had been necessary for him to assemble a large number of methods of test, some of which border on tests of the public pocketbook rather than tests of electrical or mechanical quantity. I refer particularly to the space which he has been obliged to give to some of the more doubtful forms of mining, water, or treasure exploration and medical tests. Exploitation of the public is being made along those lines, along with the development of real means; and exploitation of the medical and semi-medical fraternity is also being done to a considerable degree.