A Manual Of Photography

INDEX. 321 Steel plates, photographie pictures on, 31. Stereoscope, 303. Stokes, Mr., on extra-spectral rays, 151. -------on extension of spectrum, 117. Sublimate, corrosive, its use, 93. Sulphites employed as bleaching agents, 192. Sugar of milk, its use, 231. Summary of history of photography, 108. Talbot, Henry Fox, invents photogenic drawing, 19. -------relinquishes his patent right, 304. Talbotype, the, 218. -------modified by Mr. Cundell, 218. Tartrate of silver, 134. Taylor, Dr. Alfred, on the printing process, 223. Theory of the daguerreotype, 137. Thermography, 165. Thlaspi, photographic use of, 35. Thomas, Mr., on M. Flacheron's pro- cess, 233. Time required to decompose bromo- iodide of silver, 146. -------to determine affinity for mer- cury, 146. Tin, protochloride of, 85. Towson, Mr., on lenses for the camera, 106. Towson, experiment with fulminates, 134. Trough for washing daguerreotypes, 253. Unsized paper, 191. Variations in chemical action of sun's rays, 41. Verignon, M., on hydriodic photo- graphs, 296. Violet rays, magnetic character of, 5. observed by Scheele to blacken luna cornua, 4. Vogel on changes in fat, phosphorus and ammonia, 10. Voltaic agency employed in fixing, 214. Wax, bleaching of, by light, examined by Senebier, 4. Waxed paper introduced, 103. , process on, 231. Wedgwood the discoverer of photo- graphy, 7. Wheatstone on the stereoscope, 303. Wollaston, Dr., on the decomposition of gum guaiacum, 5. Woods, Dr., Iris catalysotype, 79. Young, Dr., chemical action of co- loured rings, 7. Zinc and soda, chlorides of, 130. THE END. WILSON AND OGILVY, SKINNER STREET, SNOWHILL, LONDON.