Apparatus used in Millers process for purifying gold. (One half), c. 1894 Apparatus used in Millers process for purifying gold. (One half)
Framed calibration certificate for 25 tonf Amsler testing machine dated 6/12/77 Framed calibration certificate for 25 tonf Amsler testing machine dated 6/12/77
Model of an old form of Welsh Calcinator furnace for copper ores (scale 1:20) Model of an old form of Welsh Calcinator furnace