12 THE TOBACCO PLANT. 



attested though they be ' by experiments demonstrating 

 the physiological action of the drug on animals,' — that 

 is, experiments to show that what may be injurious to 

 a dog that dies of old age at sixteen, and to a rabbit 

 which breeds seven times a year, and hardly lives five, 

 must be equally so to a creature that lives seventy or 

 eighty years, and whose ingenuity has altered the very 

 face of the planet he dwells on." 



