1862 London Exhibition: Catalogue: Class VIII.: M. A. Soul
From GracesGuide
1992. SOUL, M. A., 3 Leadenhall Street.
Salinometer for steam boilers using salt water (Long's patent).
Grace's Guide
British Industrial History
1992. SOUL, M. A., 3 Leadenhall Street.
Salinometer for steam boilers using salt water (Long's patent).