H. Barker asks how to make a strong but cheap battery to operate an electric bell. It is better to buy than to make a battery, because cheaper. You can get from Bonnell & Co., New York, a good cell for seventy-five cents that will last a long time, and it is what is called a "dry" battery, hence it does not overflow. If you must make one, you will find the "dry" kind expensive, so make a gravity one. Take a glass candy jar and put into the bottom some old copper, any shape. To it attach covered wire, leading out of the jar. Suspend about the middle a piece of zinc, and fasten to it a second wire. Pour lukewarm water in until the zinc is well covered, and drop into it a dozen bits of blue vitriol (sulphate of copper). Let stand for two or three days, cleaning the zinc with a brush daily. Lester L. Riley, 929 East Fifth Street, Dayton, O., wants to send to publishers of amateur papers some stories, poems, etc. Who wants them? W. Randall Sperlock, 3108 Imogene Avenue, Mt. Auburn, Cincinnati, O., is desirous of procuring a copy of HARPER'S YOUNG PEOPLE, No. 640, dated February 2, 1892. Who can sell it to him? * * * * * Edward D. Cassin: Tuition in the large colleges varies from $40 to $150 a year. Select your college and apply to the Dean for rates. Military academies are located at many points--Manlius, N. Y., Chester, Pa., Cornwall, N. Y., etc. See list of them in the advertising pages of HARPER'S MAGAZINE. Subjects embraced in the New York Regents' examination are some twenty in number. For full information, which would require this entire page to give you here, apply to Melvil Dewey, Secretary of the State Board of Regents, Albany. The price of the papers, with full explanations, is twenty-five cents. The principal of your school is likely to possess a copy. [Illustration: STAMPS] This Department is conducted in the interest of stamp and coin collectors, and the Editor will be pleased to answer any question on these subjects so far as possible. Correspondents should address Editor Stamp Department. The new Cuban Republic, it is understood, has made arrangements with parties in New York city for the printing of bonds and postage-stamps. As yet no designs for stamps have been seen.