Macgregor-Morris portable hot wire anemometer with Wheatstone-bridge, 1920 Macgregor-Morris portable hot wire anemometer with Wheatstone-bridge 1920
Part of 4 forms of hot-wire anemometer head, designed by John Macgregor-Morris, East London College, London, England, 1912 Part of hot-wire anemometer heads, british, 1912 1912
Main part (?) of 4 forms of hot-wire anemometer head, designed by John Macgregor-Morris, East London College, London, England, 1912 Part of hot-wire anemometer heads, british, 1912 1912
4 forms of hot-wire anemometer head, designed by John Macgregor-Morris, East London College, London, England, 1912 Hot-wire anemometer heads, british, 1912 1912