SS City of Glasgow of 1850 was a single-screw passenger steamship of the Inman Line, which disappeared en route from Liverpool to Philadelphia in March 1854 with 480 passengers and crew. Based on ideas pioneered by Isambard Kingdom Brunel's of 1845, City of Glasgow established that Atlantic steamships could be operated profitably without government subsidy. After a refit in 1852, she was also the first Atlantic steamship to carry steerage passengers, representing a significant improvement in the conditions experienced by immigrants. In March 1854 City of Glasgow vanished at sea with no known survivors. Development and design Built by Tod & Macgregor of Partick, Glasgow and launched on 28 February 1850, City of Glasgow at first carried 44 first class and 85 second class passengers along with 1,200 tons of cargo. Her iron hull considerably reduced repair costs incurred by the wooden-hulled steamships of the day, and the use of a propeller instead of paddle wheels allowed more space for passengers and cargo. City of Glasgow was especially economical because she was not built for speed; her best time across the Atlantic was 14 days, 4 hours, almost 4 days longer than Cunard Line's Asia, the record holder in 1850. While the City of Glasgows two-clinder lever-beam engine of produced a moderate , her coal consumption was only 20 tons per day, compared with 76 tons for Asia. Service history She made five voyages on the Glasgow – New York City service on Tod & Macgregor's own account and sailed on her maiden voyage on 15 April 1850. City of Glasgow was the first steamship to travel from Glasgow to New York. William Inman, a business partner of the line of sailing packets, persuaded his other partners to expand their line by buying the advanced new steamship. On 5 October 1850, she was purchased by the newly formed Liverpool and Philadelphia Steam Ship Company (also known as the Inman Line) and moved to the Liverpool – Philadelphia route from 17 December 1850. In 1852, the company entered the immigrant trade and City of Glasgow was refitted to accommodate an additional 400 third class passengers in her holds. Cabins were available in state rooms from fifteen to twenty one guineas for each berth. Steerage passengers were charged eight guineas. Dogs were £3. Disappearance City of Glasgow left Liverpool on 1 March 1854, with 480 people aboard. There were 111 cabin and