224 PROCEEDINGS OF THE AMERICAN ACADEMY 



Percentage of Light reflected from Different Substances. 



Experiments with one candle comparing the reflective power of 

 paper and a mirror. (Fig. 1.) Paper was foolscap. 



Percentage in terms of reflection of mirror 



Percentage of Total Light reflected from a Mirror. 



Experiments with two candles. (Fig. 2.) In the following ex- 

 periments a candle was substituted for the mirror at «, in order to 

 get the percentage of total light reflected, eliminating the coefficient of 



Fig. 2. 



reflection of a mirror. To eliminate the error which might arise from 

 unequal combustion, the candles were changed about during each ob- 

 servation, and the average of the two ratios taken. The following are 

 the results : — 



