INDEX. 



A. 



Absorbent media, action of 197 



Absorption of chemical rays 231 



of radiant heat 200 



" of radiations, necessity of. 186 



Achromaticity of camera 210 



Actinic rays 130-132 



Adhesion and capillary attraction. . . 346 



Air in interior of flame 68 



Albertus Magnus on phosphores- 

 cence 135,159 



Alchemy 313-315 



Alcohol flame spectrum, analysis of. 55 



Allotropism in living beings 375 



its successive stages 310 



of chlorine 284 



Analogies of heat and chemical rays. 230 



Angstrom's discovery 186 



law 428 



Animal and flame, analogy of. 189 



Animals, circulation in 370 



Antagonism in spectra 98 



Anthracite, burning, analysis of 57 



Arseniuretted hydrogen 55 



Arterialization of blood 378 



Atmospheric lines 75 



Attraction, capillary 342 



B. 



Baldwin's phosphorus 134 



Bancalari's experiment 456 



Becquerel on rayons continuateurs. . . 278 



k ' on ultra red lines 79 



Bending of stems of plants 413 



Berzelius on allotropism 376 



" on carbon compounds 303 



Bitumens and resins 408 



Blood, arterialization of 378 



Blow-pipe flame 68-69 



Bolognian stone 1 34, 166 



Boracic acid, spectrum of 55 



Bouguer's photometric method.. . 39, 156 

 " " " criticised 



byMel- 

 loni.... 49 

 Boyle, experiments of, on diamond. . 135 



" on movements in solids 343 



Brewster's experiments, criticism on. 36 



Bromide of silver as test 202 



Bromine cannot decompose water. . . 445 



Bubbles, soap, endosmosis through. . 356 



Budde on chlorine 427 



Bunsen and Roscoe, experiments of. 429 



" quoted 263 



Burning glasses and mirrors . . . 436-441 



" driven by clock 443 



C. 



Calcium light, radiations of 320 



Calorific hypothesis of vision 1 02 



Camphor, experiments with 203 



Canton's phosphorus 136 



Capillary attraction 342 



" " an electric phe- 

 nomenon 346 



Carbon, allotropism of 285 



" nucleus in vision 105 



" solid, disengaged in flame .. 60 

 Carbonic acid decomposed by color- 

 ed solutions 172 



" decomposed by light.. 167 

 " decomposed in spec- 

 trum 169, 410 



Carbonic oxide, spectrum analysis 



of * 54,66 



Carbuncle, legend of. 133 



Chemical force, distribution of, in 



spectrum 404 



" hypothesis of vision 105 



" radiations, absorption of. . 201 

 " rays, action of silver iodide 



on 236 



Chlor-hydrogen photometer 245 



Chlorine and hydrogen, relation to 



light 248, 282, 425, 431 



Chlorine, active and inactive 271 



" duration of its modifica- 

 tion 273,283,313 



indigo rays absorbed by. . . 276 



its allotropism 2S4 



modified 271 



substitutes hydrogen 306 



two stages in its modifica- 

 tion 274 



" water decomposed by 286 



Chlorophane, its phosphorescent prop- 

 erty 141 



