The Dixon Crucible Works, started by Joseph Dixon, the inventor of the Graphite Crucible, first established at Salem, Mass., in 1826, removed to Jersey City about 1850. Mr. Dixon introduced his invention in numerous factories in America and Europe, but the one in Jersey City, with its importations of graphite from Ceylon and Bohemia, its ownership of graphite mines in New England and New York State, and of a great cedar working plant in Florida, is the only factory in the world where all graphite products, crucibles, pencils, stove polish and lubricants are manufactured under the one management. About 1830, Mr. Isaac Edge established a factory for the manufacture of fireworks, which grew to be the largest in the country, and was widely known in Europe and South America. He was the inventor of the scenic fireworks, so popular to-day, and his manufactory was a training school for American pyrotechnists. Jersey City can boast a long list of inventors, from Robert Fulton down; Professors Morse and House were residents of Jersey City while evolving the telegraph; and in many of the factories and foundries are numerous inventions of the mechanical experts connected with them; for instance, the weaving and knitting machinery of the fire hose factory are the inventions of Mr. D. L. Stowe, an officer of the company and a resident of Jersey City. The Thompson and Bushnell Foundry Company are inventors of numerous valuable patents in their line; the list might be extended far beyond our limit. The first Stock Yard and Transit Company in the country was opened at Communipaw in 1866. I have found the statement that the "first bell made in a mould from blistered bar (cast) steel was made May 27, 1827, at Jersey City." Also that the Kamschatka, "the largest war steamship in the world, in November, 1840, received her machinery at Jersey City." I have been unable to learn to what nation the Kamschatka belonged, nor what foundries furnished her machinery, and made the bell. FIRE AND POLICE DEPARTMENTS. In 1829 a Fire Department was started by public subscription; about the same time the Police Department also had its remote beginning in the appointment of seven watchmen. After their term of office expired their places were not filled until, in 1837, four night watchmen were appointed and the City Marshal served by day. In 1844 three men were appointed to serve as watchmen and lamplighters, with a salary of $32 a month. In 1845 they were required to call the hour during the night "until the hour of calling off arrive." Not until 1851 were uniform caps and clubs introduced. In 1859 the first station house was built at Cooper's alley and Gregory street. The present form of police government was started in 1866 and the first mounted police were organized in 1873.