338 



LAWS OF VARIATION. 



Chap. XXV. 





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hair of any other colour, but that in addition some great con- 

 stitutional difference must stand in correlation 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. 



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