AS BELATED TO WEALTH. 113 



mand and obtain satisfaction. "We should all sus- 

 tain the action but we sneer at bird-laws, allow 

 insectivorous birds to be destroyed for sport, and 

 regard those who study insects as foolishly em- 

 ployed. It is by the labors of Harris, and such ob- 

 servers of this hungry, numerous host, that we can 

 drag them from their lurking-places, know them 

 under all their disguises, destroy the injurious by 

 taking advantage of their own instincts, and spare 

 those that are useful by preying upon others. Birds 

 are our natural protectors from this foe. But the 

 broad acres of cultivation have increased faster than 

 the birds. Our only help is science the study of 

 their whole Natural History. This will save for us 

 millions in a single year. In some parts of our 

 country the struggle is now really a desperate one 

 many choice products are preserved only by con- 

 tinual warfare. And to maintain our ground, we 

 need the aid of every entomologist in the land. 

 The labors of such a man as Harris are worth many 

 fortunes every year. 



"We are all ready to acknowledge that Agricul- 

 ture is the grand source of national wealth. It is 



10* 



