This spirometer, built by Geoffrey Kaye for demonstration purposes, features a large, rectangular panel of wood with a wooden needle and a dial numbered from 000 to 3000 in increments of 100, which would have measured a patient's lung capacity as they breathed into a tube which is no longer present. The panel is attached to a wooden frame, which also supports a red Stenco brand pulley attached to a metal canister and a counterweight. There are two taps on the bottom of the canister. There is an elongated U-shaped glass tube affixed to a wooden plank to the right of the canister, beneath the pulley.spirometer, spirometry, machine, diagnostic machine, diagnostic machinery, respiration, lung capacity, tidal lung capacity, geoffrey kaye

First programmable calculator used by Thompsons Castlemaine Ltd..1) Hewlett Packard programmable calculator model HP9100A. Cream coloured metal housing. Four segment keyboard with keys coloured grey, cream and fawn. .2) Selection of 10 diagnostic cards for above in a plastic case with a clear plastic hinged push back lid..1) Serial number on rear plate "816-00508". .2) Cards part number 5060-5919.engineering, programmable calculator