G. and J. Weir of Holm Foundry, Cathcart, Glasgow and now known as the Weir Group. The company was established in 1871 as an engineering firm by two brothers, George and James Weir, founding G. & J. Weir Ltd. The Weir brothers produced numerous groundbreaking inventions in pumping equipment, primarily for the Clyde shipyards and the steam ships built there. These pumps became extremely well known for their use as boiler feedwater pumps, and for ship's auxiliary equipment such as evaporators. Under W D Weir, the company turned to producing munitions and war material in the First World War. As well as shells, they manufactured aircraft including the Royal Aircraft Factory F.E.2 fighter and bomber. James George Weir (aviator, son of James Galloway Weir) a director of the company formed the Cierva Autogiro Company. G & J Weir would be a financial supporter of the company during its existence. In 1943, they provided the finances for the construction of the W.9, an experimental helicopter, to Air Ministry requirements. It was first listed on the London Stock Exchange in 1946. Double-acting Weir steam pumps were virtually standard fitment on British-built steamships, being used for pumping water, fuel, air and much else well into the 1950s, as well as being used on other ships worldwide. Historic - Double-acting Weir steam pumpSteam Driven Pump made of iron & steel puffing billy, weir pump, weir, steam driven pump