472 



INDEX. 



Phosphorescent bodies, effect of heat 



on.... 159-161 

 " effect of mag- 

 netism on.. 151 

 " effect of press- 

 ure on 144 



" effect of press- 

 ure on, by 

 forceps.... 145 

 " electricity of. 151 

 " emit heat. 148-150 

 " examined by 

 Bouguer's 

 method.... 156 

 " " examined by 

 photogra- 

 phy 155 



" examined by 

 the polari- 



scope 146 



" examined by 



vapors 147 



" quantity of 

 light of 



1 53, 155, 157 

 " structural 



change of.. 146 



Phosphorescent images 322 



Phosphorogenic experiments by Hen- 

 ry 318 



Phosphorus, action of light on 105 



modified by light.. 281, 313 



Phosphuretted hydrogen 281 



Photo decomposition, cause of. 457 



Photographic portraits 215 



Photography, microscopic 338 



" specimens 



of. 341 



Photometer, chlor-hydrogen 245, 253 

 " its sensi- 



tive- 

 ness . . 247 



ferric-oxalate 267 



" selective 269 



Photometric methods. 39 



Pigment, dark, its use in vision 103 



Plants and animals, balance of 181 



" circulation in 367 



' ' decomposition of carbonic acid 



by 169 



" force included in 177 



Platinum, emission of light by 25 



Polarization bv magnetism 456 



effect of 455 



Portal circulation 371 



Portraits from life by photogra- 

 phy 215 



Priestley's experiments 181 



Prismatic spectrum, its defects 112 



Prisms, distribution of heat by 400 



Protecting rays 87 



Pulmonary circulation 371 



Q. 



Quartz and glass in phosphorescence. 316 



R. 



Radiant heat, absorption of 200 



Radiations, interference of 89 



' ' of red-hot bodies 23 



Red heat 28 



" rays 406,421 



Reference spectrum 31, 57, 199 



Reflections, repeated, effects of 449 



" in globe under 



mercury 450 



Refrangibility and chemical energy 



connected 70 



increases with temper- 

 ature 36 



Resistance in thermo-electricity 330 



Hetina, function of. 103 



Reversals in the spectrum. 423 



Ritter's experiments 202 



Roscoe and Bunsen, quotation from. 264 

 Rumford's experiments on plants. ... 1 80 



photometric method 39 



Rutherfurd's gratings 117 



S. 



Salt in flame 56 



Sap, circulation of 367 



Scheele on chemical radiations 130 



Seeds, germination of 184 



Selective photometer 269 



Sensitiveness, cause of 233 



control of 241 



Shadows on phospliori 137 



Shell construction of flame 59 



" inner temperature of, of flame.. 70 



Silk, evolution of gas by 1 82 



Silver chloride, action of burning-lens 



on 446 



" salts, their decomposition. 406, 417 



Soap-bubble, endosmosis through.... 356 



Sodium line 62 



Solids have same point of ignition.. . 30 

 ' ' spectrum analysis of radiations 



of. 57 



Somerville's experiments 191 



Spectres evoked by breathing 137 



Spectroscope of 1 848 54 



Spectrum analysis of flames 52-54 



dark spaces of 124 



effect of daylight in 56 



length increases with tem- 

 perature 33 



length of. in ignited solids. 31 



prismatic, its defects 112 



structure of 402 



