POLO STICK.--Our boys should be interested in this invention, as it suggests many ideas for the improvement of other sporting goods. While the inventor has called his idea a polo stick, it is in fact in the glove that the novelty lies. [Illustration: Polo Stick] This is made of strong leather, and in the palm a metal plate or lock is fixed. The glove fastens at the wrist with a strong button. The polo stick, instead of being grasped around the stock, is held by a metal handle, in the centre of which is a hasp fitting the lock in the palm of the glove. The polo stick is thus firmly locked to the hand and practically becomes a part of the user's arm. So strong is the lock that the stick must be splintered before it will give way. For polo such a device is invaluable, for dropping one's stick means dismounting and losing much valuable time; but a simple locking device would be of great assistance in all games that require the stick, bat, or club to be held with especial firmness. SPRING CASTER.--This is a very novel idea, and one which is likely to become very popular if it is found to be practical. [Illustration: Spring Caster] Between the roller of the caster and the plate which attaches it to the chair-leg, a strong spiral spring is inserted. The chair thus supported adapts itself to every movement of the sitter, and gives ease and comfort that no firmly fixed seat can do. For writers these springs are particularly delightful, as the forward movement of the body brings the seat forward with it, and the writer can have the comfort of resting his back at the same time that he is at a convenient angle for his work. G.H.R. LETTERS FROM OUR YOUNG FRIENDS. We have received two very interesting letters, one from E.J.K., 461 West 43d Street, and one from C.H.K., 504 West 44th Street. We thank these friends for their kind letters, but are unable to print them at length. _To the Editor._ DEAR SIR:--In your article in No. 51, on the forest fires and drought following a very wet season, and remarking that we should have such extremes, is it not due--our irregularity of climate--to our careless devastating of whole portions of the country of trees? Many claim so. We are in sore need of national or state foresters. [Signed] INQUIRER. DEAR INQUIRER: While vegetation has something to do with the climate, the sudden changes to which we are subject are due to the configuration of the land. The Rocky Mountains and the Appalachian Range rising at either edge of the continent form the immense valley through which the Mississippi takes its course; and these two factors of the high mountains and the broad plains have the greatest influence on the climate. Our immense length of seaboard and the proximity of the Gulf Stream are also agents for engendering our variable climate.