. Scientific American Volume 82 Number 12 (March 1900). J. U. S. Metal Polish. Indianapoiis. Samples Notions. Waterbury Button W aterby, Novelties wanted. Bliss Metal Co., R. I. Write Baker Mfg. Co., Racine. Wis., about pushingany new article. Facilities excellent. Handle & Spoke Mchy. Ober Mfg. 10 Bell falls, O. Machinery designed and constructed. Gear Garvin Machine Co., Spring* and Varick N. Y. Kerracute Machine Hridgetoii. N. J., U. S. A. Fullline of Presses, Dies, and other Sheet Metal Machinery. For Sale—Patent, for
. Scientific American Volume 82 Number 12 (March 1900). J. U. S. Metal Polish. Indianapoiis. Samples Notions. Waterbury Button W aterby, Novelties wanted. Bliss Metal Co., R. I. Write Baker Mfg. Co., Racine. Wis., about pushingany new article. Facilities excellent. Handle & Spoke Mchy. Ober Mfg. 10 Bell falls, O. Machinery designed and constructed. Gear Garvin Machine Co., Spring* and Varick N. Y. Kerracute Machine Hridgetoii. N. J., U. S. A. Fullline of Presses, Dies, and other Sheet Metal Machinery. For Sale—Patent, foreign and domestic rights Acety-lene Generator. Absolutely new invention. Nevershown. Address immediately? V, Box 1536, N. Y. Ihe celebrated Hornsby-Akroyd Patent Safety OilEngine is built by the De La Vergne Refrigerating Ma-chine Company, Foct of East 138th Street, New York. The best book for electricians and beginners in elec-tricity is Experimental Science. by Geo. M. mail. ^4. Munn & publishers,3fll Broadway, N. HINTS IXJ C0RRK8PONDBNT8. N^aiiies and Address must accompany all letters or no attention will be paid thereto. This is for oui information and not for to former articles or answers should give date of paper and page or number of not answered in reasionabJe time should de repeated ; correspondents will bear in mind thai some answers require not a little research, and. though we endeavor to reply to ail either by lettei or in this department, each must take his wishing to jjurchase any article not advertjaed in our columns will be furnished with adAresses of houses manufacturing or carrying the Written Inloriiintion on matters ol personal rather than general interest cannot be expected without Aiiierienii Mt|iplernent« referred to may be had at the oiBce. Ince 10 cenie referred to promptly supplied on receipt of price,llliiern]*! sent£
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