In my laboratory experiments, players could not be expected to do full justice to their powers. They had to strike as nearly as possible in the centre, a ten-inch disc of clay, the ball being teed about six feet in front of it. Besides this pre-occupation, there was always more or less concern about the possible consequence of rebound, should the small target be altogether missed.
It will be apparent even to anyone who is not possessed of a scientific or analytical mind that Professor Tait compelled his players to endeavour to play their strokes in such a manner that the ball had to travel down a line decided on by Professor Tait. I do not know at what height Professor Tait placed his clay disc from the earth, but it is evident that if he put it very low down it would involve the playing by the golfer of a stroke which would naturally produce back-spin, and in any case the trajectory was arbitrarily fixed. In experimenting with such a stroke as this, and in such a manner as this, it should be evident that there should have been no restriction whatever as to the player's trajectory. If it was decided that it was necessary to catch the ball in a clay disc, that disc should have been so large that it was impossible for the golfer's ball to escape it. It should not have been necessary for the golfer to aim at the disc. The mere fact of his aiming at the disc and the ball being teed so near as six feet to the disc, all tended to produce the shot which would give the results which Professor Tait was looking for, but that does not prove that the ordinary stroke at golf is produced in a similar manner, and I do not for one moment believe that it is.
In speaking of the stroke proper Professor Tait said:
The club and the ball practically share this scene between them; but the player's right hand, and the resistance of the air, take some little part in it. It is a very brief one, lasting for an instant only, in the sense of something like one ten-thousandth of a second.
We may note here that Professor Tait said: "The right hand and the resistance of the air take some little part in it." One would be inclined to think from this that Professor Tait was, as indeed was probably the case, an adherent of the fetich of the left, for there can be no doubt that in "the stroke proper" the right hand does much more than take "some" little part in it.
I think that Professor Tait is wrong in his idea that under-spin, or, as I prefer to call it, back-spin, is essential to a long carry. I firmly believe that a ball which is hit with practically no spin whatever, can have a very long carry. However, as the paper which I am now about to consider follows in many ways very closely on the lines of Professor Tait's article, I shall leave this matter for consideration when I am dealing with that paper.
The paper which I am now referring to is one which was read at the weekly evening meeting of the Royal Institution of Great Britain on Friday, 18th March 1910, by Professor Sir J. J. Thomson, M.A., LL.D., D.S.C., F.R.S., M.R.I., O.M.; Cavendish Professor of Experimental Physics, Cambridge; Professor of Physics, Royal Institution, London; Professor of Natural Philosophy, Royal Institution, and winner of the Nobel Prize for Physics, 1906. The title of this paper was "The Dynamics of a Golf Ball." It will be observed that neither the Institution under the auspices of which this lecture was delivered, nor the lecturer, is inconsiderable. Professor Thomson is, without doubt, a very distinguished physicist, and we must therefore receive anything he writes with a certain amount of respect. There are, however, in this paper, so many remarkable statements that it is necessary for me to deal with it quite fully.
Professor Thomson tells us very early in the lecture that Newton was well aware of the cause of swerve which I have already set out, some 250 years ago, and that he remarked that in a spinning tennis ball the "parts on that side where the motions conspire, must press and beat the contiguous air more violently, and there excite a reluctancy and reaction of the air proportionately greater."
Professor Thomson says at the beginning of his lecture:
There are so many dynamical problems connected with golf that a discussion of the whole of them would occupy far more time than is at my disposal this evening. I shall not attempt to deal with the many important questions which arise when we consider the impact of the club with the ball, but shall confine myself to the consideration of the flight of the ball after it has left the club.