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ill Stieniifit TO CORRESPONDENTS. Inventors and their ,Models. S. L., of Ill.-The best point of a conductor is to There are several small cases remaining at the va� have the iron (if the rod be iron) gold or silver pIa-rious Express offices in this city, marked to our ad ted. Spratt has a patent ou the fastener, but not dress, on which the �xpeDses have not been pre the point. We have Dever known of a point being paid. We would respectfully inform inventors that melted down. the Ex. pressdoi:10.1038/scientificamerican04241852-255b fatcat:yg6o7wycmzhmjhus2otcfirzwy