The science and practice of photography : an elementary textbook on the scientific theory and a laboratory manual (1920)
Roebuck, John R. (John Ransom), 1876-1965 · New York ; London : D. Appleton and company · leaf 284
PHOTOGRAPHY ^S4 vertical plane as the image. Remove the lens board and raise the front of the camera. Interpose the replica grating* with its rulings horizontal in the path of the light and in such a position that the lower spectrum of the first order will enter the open front of the camera and… … Fig. 50, Exp. 13. Diagrammatic arrangement of apparatus for photographing the spectrum. A is a ribbon filament tungs- ten lamp or a Nernst lamp; S an adjustable slit set horizontally in the wall of the light tight box enclosing A; B a long focus achromatic lens; C a replica grating; and D the…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Vnderweysung der Messung : mit dem Zirkel vn[d] Richtscheyt in Linien, Ebnen vnnd gantzen Corporen (1525)](https://img.insideoutlibrary.com/img/200/ia-vnderweysungderm00drer-106-206.webp)
