On Sewage Disposal on Land, by Chemical Treatment, and by Discharge into River or Sea.--By Prof. H. ROBINSON 7460 VIII. MISCELLANEOUS.--New York City Street Cars. 7460 Petroleum Wells. 7462 * * * * * PATENTS. In connection with the =Scientific American=, Messrs. MUNN & CO. are Solicitors of American and Foreign Patents, have had 39 years' experience, and now have the largest establishment in the world. Patents are obtained on the best terms. A special notice is made in the =Scientific American= of all Inventions patented through this Agency, with the name and residence of the Patentee. By the immense circulation thus given, public attention is directed to the merits of the new patent, and sales or introduction often easily effected. Any person who has made a new discovery or invention can ascertain, free of charge, whether a patent can probably be obtained, by writing to MUNN & CO. We also send free our Hand Book about the Patent Laws, Patents, Caveats, Trade Marks, their costs, and how procured. Address +MUNN & CO.. 361 Broadway, New York.+ Branch Office, cor. F and 7th Sts., Washington, D. C. [Transcriber's Note: Inconsistent spelling and hyphenation are as in the original.] End of the Project Gutenberg EBook of Scientific American Supplement, No. 467, December 13, 1884, by Various