John C. Hoyer
From Graces Guide
of St. Mary's Works, Eldon Road, Wood Green, London, N
- 1899 Company established.
- Manufacturers of scientific instruments including Dr. A. D. Waller's physiological instruments, digital sphygmographs, photographing boxes, lantern railways, myographs, chloroform apparatus etc., Lippmann's capillary electrometers etc., slow and fast clock-driven cylinders for recording, electric signal time clocks, Dr. W. L. Symes' embedding baths and apparatus, all-metal gas regulators, clinical and surgical instruments, engineers' small tools, gas and electric heated soldering irons, "Always Accurate" pocket spring balance for nurses, fishermen, jewellers etc. [1]