RECENTLY PATENTED INVENTIONS. or General Interest. COMBINATION-TOOL FOR WATCH-RE Heating and Lighting. turn be heated thereby. generated gas with perfect safety and which Business and Personal Wants. send you the name and address of the party desir NUNN & CO. no u iry No. 5888.- Wantedinformation concern South Canal Street Chicago. English and European Market for American Mann communicate. Inquiry No. 5892.-For makers of windmills used for pumping water for irrigation purposes. thorough knowledge (both theoretical and shopwork) dentists physical and electrical apparatus induction coils. Roentgen apparatus etc. and most other branches of mechanical work wants employment. the mail order business. loons. HINTS TO CORRESPONDENTS. Names and Address must accompany all letters or no attention will be paid thereto. This is for our information and not for publication. References to former articles or answers should give date of paper and page or number of question. Inquiries not answered in reasonable time should be repeated; correspondents will bear in mind that some answers require not a little research and though we endeavor to reply to all either by letter or in this department each must take his turn. Buyers wishing to purchase any article not adver tised in our columns will be furnished with addresses of houses manufacturing or carrying the same. Special Written Information on matters of personal rather than general interest cannot be expected without remuneration. Scientific Ameriop.n Supplements referred to may be had at the office. Price 10 cents each. price. Minerals sent for examination should be distinctly marked or labeled. how it works. A. The diaphragm of the same to vibrate. A. The walls of a room north when the magnet is at rest under the thing. There is no need of the name 'north The north pole of a magnet is the pole which points north and the north-seeking pole is the same. Neither name expresses the nature of the magnetism of the earth at its north pole.
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