John Dennis and Co
of Ellonville, Dalkeith, Midlothian, Scotland
- 1864 Company established.
- 1901 Incorporated as a limited company.
- 1914 Furnace and retort builders, chimney stack builders and contractors. Specialities: erecting shale oil retorts, gas retorts, chimney stacks, steam boilers, economisers and other furnaces. Employees 80 to 200. [1]