43 



CONTENTS. 



rO "OBSERVATIONS OX THE COLORS OF LEAVES. 



Replies to CiiticisiiLs, 



Color in Animals, .... 



Redness of Skin from friction not due to 



ulation, ..... 

 Nerves and Irrital)ility, . 

 Transferability of Color, 

 Natural and Artificial Change of Color, 

 Observations on the Colors of Leaves, 

 Autumnal Colors before Frost, 

 Autumnal Colors after Frost, 



stnn- 



3 



7 



8 

 11 

 15 

 16 

 21 

 30 

 33 



