Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 555
FiR. 401 an aperture. Small irregular pieces of coloured glass arc placed at one end between the ground glass and another glass disc, and when looked at through the aperture, the other end being held towards the light, the objects and their images arc seen arranged in beautiful symmetrical forms ;…
Physics
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
