Whitbread Installs a Boulton & Watt Steam Engine

In 1785, Samuel Whitbread installed a rotative steam engine built by Boulton & Watt at his brewery in Chiswell Street, London. Ordered in 1784 to replace an animal-powered horse wheel, the engine used rotary motion to drive brewery machinery. Its work included crushing malt and powering equipment used to move malt, water, beer, and other materials around the brewery. The horse wheel remained available as a backup during the brewing season. The engine illustrates how London’s large porter breweries adopted industrial technology to operate at increasing scale during the late eighteenth century. It remained in service at Whitbread until 1887 and was subsequently transferred to Australia. Preserved in Sydney’s Powerhouse collection, it is recognized as the oldest surviving Boulton & Watt rotative steam engine.