4 items - 3 wood and metal, 4 card. 1 of 4 has a wooden base with mechanism on top, movable dials and a semi circular dial face from 1-6 with what appears to be a movable blade. All metal parts are black. 2 of 4 is a wooden box with brass fittings, and a metal pole coming off one face. 3 of 4 - a black metal ring with protrusion. 4 of 4 - card instructions. Used for measuring carboxyhaemoglobin in blood. Photo shows 3 parts: wooden box (1 of 4), scope sheet (2 of 4) and loose piece of metal (3 of 4), Instructions on card (4 of 4) not in photo.
Asbestos Inspection - Non-Asbestos.
Documentation
- Journal of Physiology, Journal of Physiology Vol 44 1912, Page 1; Vol 57 1922, page 47 - Proceedings of the Royal Society of London;, B Vol.86 1913, page 128; A Vol 102 1923 page 575
