Photography.
[Experiments of Wedgewood and Davy.] [Niépce’s Heliography.] [Daguerre and the Daguerreotype.] [Fox Talbot Makes First Proofs from Negatives.] [Sir John Herschel Introduces Glass Plates.] [The Collodion Process.] [Silver and Carbon Prints.] [Ambrotypes.] [Emulsions.] [Dry Plates.] [The Kodak Camera.] [The Platinotype.] [Photography in Colors.] [Panorama Cameras.] [Photo-engraving and Photo-lithography.] [Half Tone Printing.]
The Roentgen or X-Rays.
[Geissler Tubes.] [Vacuum Tubes of Crookes, Hittorf, and Lenard.] [The Cathode Ray.] [Roentgen’s Great Discovery in 1895.] [X-Ray Apparatus.] [Salvioni’s Cryptoscope.] [Edison’s Fluoroscope.] [The Fluorometer.] [Sun-burn from X-Rays.] [Uses of X-Rays.]
Gas Lighting.
[Early Use of Natural Gas.] [Coal Gas Introduced by Murdoch.] [Winsor Organizes First Gas Company in 1804.] [Melville in United States Lights Beaver-Tail Lighthouse with Gas in 1817.] [Lowe’s Process of Making Water Gas.] [Acetylene Gas.] [Carburetted Air.] [Pintsch Gas.] [Gas Meter.] [Otto Gas Engine.] [The Welsbach Burner.]