J. J. BRIGGS.--Age does not determine the value of coins. It is altogether a question of supply and demand. If dealers have ten copies of a scarce coin and twenty collectors want them, the price will go up. If, on the other hand, there is little or no demand the prices will go down. As to U.S. coins in general I would say that the supply in the hands of the dealers is equal to any prospective demand. The immense quantity of old U.S. coins in the hands of the public will not command a premium. Coin-collecting to-day is very much what stamp-collecting was twenty years ago--that is to say, the speculative element is lacking. W. SMITHSON.--Collect Seebecks all you want. No society or association can prevent you. The stamps are pretty in themselves, and they have undoubtedly been used for postal purposes. G. H. DAVIS.--I never heard of the stamps issued by the "Stamp-Saving Society." They are interesting as curiosities. PHILATUS. [Illustration: ROYAL BAKING POWDER] Celebrated for its great leavening strength and healthfulness. Assures the food against alum and all forms of adulteration common to the cheap brands. ROYAL BAKING POWDER CO., NEW YORK. Arnold Constable & Co. SPRING IMPORTATIONS. PARIS LINGERIE. _Tea Gowns, Matinées._ SHIRT WAISTS. _Glacé Silk Petticoats._ CHILDREN'S WEAR. _Outing Suits,_ _Gingham and Organdie Frocks,_ _Reefers, Jackets._ Broadway & 19th st. NEW YORK. MR. LAURENCE HUTTON contributes a short story The Uncertain Glory of an April Day to the next number of HARPER'S ROUND TABLE Five Cents a Copy. Two Dollars a Year. * * * * * HARPER & BROTHERS, Publishers, N. Y. [Illustration: PISO'S CURE FOR CONSUMPTION] CURES WHERE ALL ELSE FAILS. Best Cough Syrup. Tastes Good. Use in time. Sold by druggists. [Illustration: THE CAMERA CLUB] This Department is conducted in the interest of Amateur Photographers, and the Editor will be pleased to answer any question on the subject so far as possible. Correspondents should address Editor Camera Club Department. LANTERN SLIDES. So many of our new members have written asking how lantern slides are made, and what is required for an outfit, that we publish another paper on the subject.