the former capital of Pakistan, is located on an arm of the Arabian Sea northwest of the Indus delta. It is a trade and distribution center and the principal seaport of Pakistan. Karachi was founded in the 18th Century and was captured by the British in 1843. A steam tramway was opened to the port on April 20, 1885, and was replacedwith a horse tramway a year later. In 1909 the horse trams were replaced with distinctive-looking petrol cars. There were 64 of these in service in 1955 when the company celebrated its 70th Anniversary. The petrol trams continued in service until April 30, 1975.