Scientific Memoirs: Being Experimental Contributions to a Knowledge of Radiant Energy

absorbed absorption actinometer allotropic atmospheric atoms beam blue bodies bulb carbonic acid chemical action chemical rays chlorine and hydrogen chlorophane color condition convex lens copper daguerreotype dark daylight decompose decomposition diffraction spectrum effect electric spark emitted endosmosis evolved experiments exposed exposure facts Fahr film fixed lines flame Fraunhofer lines gases glass green heat heliostat hydrochloric acid ical impression inch in diameter indigo ray intensity iodide of silver iodine lamp lens less refrangible liquid maximum Memoir ment mercury metallic motion needle observed obtained optical oxygen pass phenomena Philosophical Magazine phosphorescence phosphorus photographic photometer piece plants plate platinum portion principle prism prismatic produced radiations refrangible rays refrangible regions remarkable retina rise screen sensitive shine silver iodide solar solution space substance surface takes place temperature tint tion trough tube vessel vibrations violet vis viva visible spectrum voltaic wave-lengths wires yellow