"Wella" permanent wave machine and chemicals etc., c.1936 "Wella" permanent wave machine and chemicals etc. 1936
Wave motion model, to illustrate the wave theory of light, invented by Sir C. Wheatstone, made J.Newman, London, c.1842. Complete with altenative wooden wave strips and some spare metal rods. With MS instructions for using the machine on headed notepaper of John Newman, 122 Regents Street, London Wave motion model, to illustrate the wave theory of light, with alternative parts 1840-1845