I have not said anything about the S.P.R. itself, but may here add a few remarks. Says its official leaflet: "The aim of the Society is to approach these various problems without prejudice or prepossession of any kind, and in the same spirit of exact and unimpassioned inquiry which has enabled Science to solve so many problems, once not less obscure nor less hotly debated.... Membership of the Society does not imply the acceptance of any particular explanation of the phenomena investigated, nor any belief as to the operation, in the physical world, of forces other than those recognised by Physical Science". In other words, the Society has no creed, except that the subject is worth investigating. The Society has well over 1,000 members, and is growing steadily. It includes many famous men in all walks of life, and indeed its membership list has been said to contain more well-known names than any other scientific society except the Royal Society itself. Among the Vice-presidents are the Right Honourables A. J. and G. W. Balfour, Sir William Barrett, Sir Oliver Lodge, the late Bishop Boyd-Carpenter and the late Sir William Crookes. The President for the current year is Lord Rayleigh, probably the greatest mathematical physicist now living.[5] The President of the Royal Society (Sir J. J. Thomson) is a member, also Professor Henri Bergson of Paris, Dr L. P. Jacks (editor of _The Hibbert Journal_) and innumerable other scientists and scholars whose names are known to everyone. [5] Lord Rayleigh's lamented death has since occurred, July, 1919. Finally let me assure you that the S.P.R. is so conservative and suspicious that admission is almost as difficult to obtain as membership of a high-class London club. It is extremely anxious to keep out cranks and emotional people of all sorts, and it requires any applicant to be vouched for as suitable by two existing members; and each application is separately considered by the Council. The result is a level-headed lot of members, and the maintenance of a sane and scientific attitude and management.