HEATING AND VENTILATING BROODERS. 321 



shows that the growth of civilization is sure, even if 

 slow, and justifies the prediction that when the world 

 finds, as it will, that progress has rendered the avoid- 

 ance of a big death rate in chicken raising comparatively 

 easy, such an old-time massacre of the innocents will 

 be frowned upon and considered disreputable in the high- 

 est degree, if not punished by fine and imprisonment. 

 21 



