IV.—Classified list of patents, &c.—Continued. Inventions or discoveries. Gum senegal, substitute for, (antedated May 30, 1837.) India rubber, manufacture of... Lead, carbonate of... Matches, locofoco, dipping. Paint, composition.... Paint, protection of buildings. Preserving timber from worms.. Soap, making..... Sugar, manufacturing. CLASS V.-Calorific, comprising lamps, fireplaces, stoves, grates, furnaces for heating buildings, cooking apparatus, preparations of fuel, &c. IV. Classified list of patents, &c.-Continued. CLASS VI.-Steam and gas engines, including boilers and furnaces therefor, and parts thereof. IV. Classified list of patents, &c.-Continued. CLASS VII.-Navigation and maritime implements, comprising all vessels for conveyance on water, their construction, rigging, and propulsion; diving dresses, life preservers, &c. IV.—Classified list of patents, &c.—Continued. CLASS VIII.-Mathematical, philosophical, and optical instruments, including clocks, chronometers, &c. CLASS IX.-Civil engineering and architecture, comprising works on rail and common roads, bridges, canals, wharves, docks, rivers, weirs, dams, and other internal improvements, buildings, roofs, &'c. CLASS X.-Land conveyance, comprising carriages, cars, and other vehicles used on roads, and parts thereof. |