Spectrum analysis : six lectures delivered in 1868 before the Society of Apothecaries of London (1885)
Roscoe, Henry E. (Henry Enfield), 1833-1915, Schuster, Arthur, Sir, 1851-1934 · London : Macmillan and Co. · leaf 52
, whilst we shall get no corresponding effect on the portion exposed to the red ray. I next place my plate with its face downwards on the negative; we now start our electric lamp, using a small spectrum in order to have the action rather more distinct. I then expose half my plate in the red rays… … Fig. 16. produced on the screen, when you will observe (Fig. 17) a very marked difference between the two halves, the one showing that no action has been produced on the sensitive plate exposed to the red rays, and the other giving us the perfect picture with the Y upon it. Now let me bring before…
Spectrum analysis
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
![An illustration from Wedding's Basic Bessemer Process. Translated [from the supplement to the author's Darstellung des schmiedbaren Eisens” entitled, “Basische Bessemer oder Thomas Process”] ... by W. B. Phillips ... and E. Prochaska ... With a supplementary chapter on dephosphorization in the basic open-hearth furnace, by E. Prochaska (1891)](https://img.insideoutlibrary.com/img/200/bl-bl_003874923_0-162-1.webp)
