John Joseph Merlin he wheeled about himself, with great facility to any part of the room." At an event held by Teresa Cornelys in Carlisle House, Soho Square, Merlin appeared somewhat disastrously on roller skates of his own invention. By April 1783 Merlin was putting his musical instruments and his automatons on display at his own museum. Advertisements invited readers to visit his Museum of Musical Instruments and Mechanical Inventions at No. 2, Princes Street, Hanover Square, London. Well-off Londoners could meet their friends at Merlin's Mechanical Museum in the afternoon or evening, pay to see the exhibits, and drink tea or coffee
David Brooks (inventor) invention, Brooks worked for the Pennsylvania Railroad, which in the 1850s received permission to build its own telegraph line, having bought necessary patents. Brooks was the railroad's first superintendent of telegraphs, appointed in 1852. David Brooks (inventor) David Brooks was an Philadelphia, Pennsylvania inventor, remembered for an innovative insulator for telegraph lines in 1864 and 1867. He patented it while working for the Central Pacific Railroad. His patents allowed the railroad to more easily communicate with construction crews building the First Transcontinental Railroad in America. The insulator had a thick metal casing around blown glass; the assembly was held together