A Manual Of Photography

112 HISTORY OF PHOTOGRAPHY. Methyle —continued. Fat matter Vogel . . . . .1806 Development of pores in plants Labillardière .. .1801 Vitality of germs Michellotti . .. .1803 Besinous Bodies (Hellography) Niepce . . . . .1814 Asphaltum Niepce . . . . . 1814 Besin of oil of lavender . . . Niepce and Daguerre 1830 Guaiacum Wollaston . . . . 1803 Bitumens all decomposed .. Daguerre . .. . 1839 All residua of essential oils.. Flowers, colours of, expressed, am Daguerre . .. .1839 spread upon paper . . Herschel . . . . 1842 Yellow wax bleached . . . . Senebier . . . . .1791 fLicetaa . . . . .1646 Phosphorescent influences of, solar rays .... Kircher . . . . Canton . . . . Biot .1646 .1768 . 1840 lE. Becquerel .. .1839 Vegetation in stagnant water . Influence of light on electrical Morren . . . . .1841 phenomena . . . . E. Becquerel .. .1839 In the foregoing chapters every thing has been included which appeared necessary to the complete illustration of the history of the very beautiful art of Photography. It may appear to many that the manipulatory details included in this division should have been reserved for that which is more strictly tech- nical. The difficulty of doing this without repeating in an unnecessary manner has led me to adopt what I consider to be the clearer course.