INDEX 285 



Light, photosynthetic coefficient for, 38 

 ,, record of hourly variation of, 104 



relation between photosynthesis and quantity of, 48 



unit of, 32 

 Light-noon and thermal noon, 106 



Malic acid, as substitute for C0 2 in photosynthesis, 128 



photosynthetic curve under increasing supply of, 129 

 Mangin, 2 



Maximum photosynthesis, dependence on intensity of light, 43 

 ,, response under variation of intensity of stimulus, 52 



Nitric acid, effect of infinitesimal traces of on photosynthesis, 67 



Optimum temperature for growth, 141 ; for maximum excitability of 



Mimosa, 139, 141 ; for photosynthesis, 139 



„ ,, modification of under intensity of stimulus, 139, 261 



Organic acids, photosynthetic assimilation of, 127 

 Oxygen, absorption by water, 1 1 



,, carbohydrate factor, 215 



,, determination of photosynthesis from equal volumes of, 18 



,, evolution of pure gas, 10 



Photometer, Hydrilla plant as, 44 



,, Electric, determination of loss of light by reflection and 



,, absorption by, 45 



,, measurement of intensity of light by, 108 



Pantanelli, 115 

 Pfeffer, 166, 222 

 Photosynthesis, Automatic Recorder for, 23 



,, combined effect on, of variation of factors — ■ 



C0 2 -concentration and light, 256 



„ ,, ,, temperature, 257 



temperature and light, 259 

 C0 2 , light and temperature, 263 

 CO a , light, temperature, and tonic condition, 264 

 ,, in absence of carbon dioxide, 123, 274 



,, Laws of: for C0 2 -concentration, 248 ; for light, 250 ; for 



temperature, 246 ; for tonicity, 251 

 ,, formula for : C0 2 -concentration, 119 ; light, 40 ; tem- 



perature, 142 

 ,, simultaneous determination of, and of energy of spectral 



rays, 192 

 Photosynthetic coefficient : for C0 2 -concentration, by differential method, 



118 ; by absolute method, 246 

 ,, ,, for light, by differential method, 38 ; by abso- 



lute method, 249 

 for temperature, by differential method, 141 

 by absolute method, 245 

 ,, curve: for C0 2 -concentration, 115 ; for light, 35 ; for malic 



acid, 129; for temperature, 140 



