Mr. Rowland. I have studied quite a bit of electronics, sound. Math and science is what I like.
Senator Cooper. You said you had read books on this subject. Did you ever conduct any experiments yourself?
Mr. Rowland. Yes; in the form of—there is a theory that sound is a basis of a transmitter and a receiver, that you have to have a receiver to have sound. There is a theory that if a tree falls down in the middle of a forest and there is nobody around where they can hear it, there is no sound.
Well, I have conducted experiments on this, and I—it is very interesting, very fascinating, but you can't prove it or you can't disprove it because if you have got a microphone there you have got a receiver.
Senator Cooper. Did you ever conduct any experiments with rifles, firing a rifle in relation to sound?
Mr. Rowland. Yes; in a firing range.
Senator Cooper. Beg pardon?
Mr. Rowland. Firing range.
Senator Cooper. Yes.
Mr. Rowland. I did conduct a few experiments. One of them was firing a bullet over water; you know, we were using a set of wood blocks to fire into, so we had a big vat of water that we were firing over, and we had several different articles and composition floating on the water, trying to measure the effect of the sound wave upon that. Such as this we did conduct.