332 LAWS OF VARIATION. Chap. XXV. 



We thus see that not only do those parts of the skin which 

 bear white hair differ in a remarkable manner from those 

 bearing hair of any other colour, but that some great consti- 

 tutional difference must be correlated with the colour of the 

 hair ; for in the above-mentioned cases, vegetable poisons 

 caused fever, swelling of the head, as well as other symptoms, 

 and even death, to all the white, or white-spotted animals. 



