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If anything were calculated to make me anxious to do justice to my theme to-night it would be the association with your society of the men to whom I owe my earliest introduction to dynamics—at St. Paul’s School to Mr Pendlebury, your Secretary, and at Trinity College, Cambridge, to Professor Forsyth, your incoming President. The interest that they implanted has survived for half a century; and the applications to sport that I propose to describe are the immediate outcome of that interest.
A paper at the Annual Meeting of the Mathematical Association, January 2nd, 1936.
Page 175 of note * It may be noted that in velveteen the pile is at right angles to the cloth; but in velvet the pile is inclined in one direction, i.e. there is a “nap” Experiments with a coin may fail unless the cloth has been brushed in the direction of the nap.
Page 177 of note * Something may be learned about boomerangs by the flicking of small models cut with scissors from a visiting card.
Page 177 of note † Q. J Pure and Applied Mathematics, 1896. A diagram, not given in the article in the Q. J., and a description is in Journal of Scientific Instruments VIII, No. 2, February 1931.
Page 177 of note ‡ It is vital that the glass plate shall rest flat on a firm table; otherwise the energy of rotation of the celt is wasted in shaking the table.
Page 177 of note ¶ A glance at a cat licking its back will show that the amount of twisting of the spinal column postulated is by no means difficult. But it performs the whole operation of rotation in the air in about an eighth of a second !
