Concentration colorimeter, model 222, by Evans Electroselenium Ltd., British probably c. 1975, with plastic cover Concentration colorimeter 1970-1980
Cambridge Transrite cardiograph Mark 2 electrocardiograph machine, no.C647127, by Cambridge Instrument Co. Ltd., English, 1959 Cambridge Transrite cardiograph Mark 2 electrocardiograph machine 1959
Salt-glazed stoneware dispensing pot for mercuric nitrate ointment, from British Drug Houses, English, 1850 to 1900 Salt-glazed stoneware dispensing pot for mercuric nitrate ointment 1850-1900