. Scientific American Volume 10 Number 25 (June 1864). red to American citizens are pro-cured through their agency. Inventors will do well to bear in mind that the English law does notlimit the issue of patents to inventors. Any one can take out a pat-ent there. Circulars of information concerning the proper course to be pursuein obtaining patents in foreign countries through MUNN & COSAgency, the requirements of different Government Patent Offices, Ac ,may be had, gratis, upon application at the principal office, No. 37Park Row, New York, or any of the branch offices. It would require many co
. Scientific American Volume 10 Number 25 (June 1864). red to American citizens are pro-cured through their agency. Inventors will do well to bear in mind that the English law does notlimit the issue of patents to inventors. Any one can take out a pat-ent there. Circulars of information concerning the proper course to be pursuein obtaining patents in foreign countries through MUNN & COSAgency, the requirements of different Government Patent Offices, Ac ,may be had, gratis, upon application at the principal office, No. 37Park Row, New York, or any of the branch offices. It would require many columns to detail all the ways in which theInventor or Patentee may be served at our offices. We cordially all who have anything to do with patent property or inventionsto call at our extensive offices, No. 37 Park Row, New York, whereany questions regarding the Rights of Patentees, will be cheerfullyanswered. Communications and remittances by mail, and models by express(prepaid) should be addressed co MUNN & CO. No. 37 Park Row NewYork. B. V. F., of Maine.—The American Journal of Pho-tography, is published by Professor Charles A. Seely, 244 Canalstreet, New York. You can obtain the instrument for testing thestrength of silver solutions irom him. G. T., of N. Y.—Your paddle-wheel appears to be newand patentable, although in view of the large number of patentsalready taken out in that class of inventions it might probably bemost advisable to have a preliminary examination made in regardto it in the Patent Office, at Washington. Expense $5. O. M. S., of R. I.^-Iron that is to be immersed in wateris protected by paint formed of red-lead and boiled linseed oil. Amore durable plan of protecting iron under water is to cover itwith zinc—galvanising as it is absurdly called. Iron may beenameled by baking a thin coat of glass upon the surface; waterpipes are sometimes lined in this way. L. W., of N. Y.—We never received your inquiry aboutbrass springs. Any machinist will c
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