Heating chamber, controlled temperature, metal, British(?), 1890-1920, Waller Collection Heating chamber, with controlled temperature 1890-1920
Five exposed x-ray plates, glass, showing views of radius and ulna, English, early 20th century Five exposed x-ray plates 1908-1914
Electrostatic machine, wooden stand, metal cylinder, glass plate and tube, bad condition, European, first half of the 19th century Electrostatic machine 1801-1850
Electrostatic machine, wood base, glass plates, metal fittings, plates broken, by Harvey and Peak of London, second half 19th century, Beak Street Electrostatic Machine 1884-1891