Association for the Prevention of Steam Boiler Explosions 1855-1931; Atomic Energy Research Establishment 1957; Board of Trade 1879-1966; Boiler Insurance and Steam Power Co 1863- 1886; Bonecourt Boilers 1914; British Empire Exhibition 1924; British Engine Boiler & Electrical Insurance Co 1878-1995; Engine and Boiler Insurance Co 1878-1905; Engineering Offices Association 1925-1964; Factories and Workshop Acts 1925-1937; Guild of Insurance Officials 1961-1968; Industrial Radiography (NDT) Ltd 1950-1973; Insurance Institute of Manchester 1926-1973; Institute of Mechanical Engineers 1917; Longridge family 1853-1980; Manchester Steam Users Association 1855-1969; WD Minto Ltd 1960-1981; National Boiler and General Insurance Co (Vulcan Boiler Insurance) 1865-1965; Royal Insurance Co 1912-1994; Box of Equipment,n.d.