286 INDEX 



Photosynthetic coefficients for absorption and transmission, 232 



„ efficiency of different rays, determination of by Hetero- 



static Method, 188 

 »» 11 ,, photosynthetic organ in storage of energy, 



227, 279 

 ,, induction, ' uphill ' work in, 83 



Physiological adjustment, period of under changed light, 34 

 factor in photosynthesis, 49, 267 

 ,, hysteresis, experimental determination of, positive, negative, 



and zero, 150 

 ,, mechanism, similarity of in all modes of response, 58, 266 



scale, advantages of, 243, 279 



zero, determination of : for C0 2 -concentration, 247 ; for 

 light, 248 ; for temperature, 244 

 Pointolite, advantages of, 27 

 Poison, effect on photosynthesis, 64 

 Puriewitsch, 223 



Radiograph, Automatic, 101 



Radiometer, Magnetic, for determination of energy of spectral rays, 180 

 Rays of spectrum, determination of energy by Magnetic Radiometer, 183 



,, ,, photosynthetic effectiveness of, 192 



,, ,, tropic effect of, 195 



complementary A and D effects of, 194 

 Reinke, 166 

 Respiratory loss, determination of, 133 



,, quotient, 126 



Richter, 166 



Sachs, 199 



Season, effect of, on variation of photosynthetic activity, 40, 58, 119 

 Solar spectrum, method of obtaining pure, 177 ; determination of dis- 

 tribution of energy in, 180 

 Stimulus, A and D effects of, 50, 55 



effect of, on growth, 60 ; on transpiration, 60 ; on photosyn- 

 thesis, 61 

 opposite effects of feeble and strong, 61 

 Storage of energy by Hydrilla, efficiency of, 236, 279 

 Sunlight and Pointolite, relative effectiveness of, 43 



„ physical and physiological measurement of, 45 



Temperature, adjustment of, 134; effect of variation of, on photo- 

 synthesis, 138 ; coefficient of, 245. 



Thermometric minimum, for photosynthesis, 137 ; for Desmodium pulsa- 

 tion, 137 ; for ascent of sap, 137 



Threshold of Response, 188 



Thunder-storm, after-effect of, on photosynthesis, 66 



Thyroid gland extract, effect of infinitesimal traces on photosynthesis, 69 



Timiriazeff, 166 



Tonic factor, effect of, on photosynthesis, 51, 154, 250, 264, 276 



