ECONOMIC ZOOLOGY. 



407 



used for something else with the young of the types 

 wanted, keeping away the enemies of the species as well 

 as possible, and doing artificially all that can be done to 

 insure their steady and profitable growth. The scientific 

 treatment of these industries means the putting on the 

 market only those that have got their best growth and 

 with the least injury to the partly grown individuals, 

 just as it does on the farm or in the forest. 



The conservation of our natural resources also means 

 that the swamp lands, that cannot be drained and used 

 more profitably, and the shallow streams shall be made 

 to produce edible frogs or turtles instead of the other 

 inedible amphibians and reptiles. Wherever edible fish 

 can grow pains will be taken to place them and see that 

 the conditions of their best life are given them. 



Various bureaus of the United States Government, 

 as that of Animal Industry, of Fish and Fisheries, of 

 Entomology, and the like; the Agricultural Experiment 

 Stations of the various States; the scientific men in the 

 universities and colleges, and many practical workers 

 who are in these fields in a commercial way are studying 

 the problems suggested in this chapter and are trying to 

 add to the vital resources of the human race and its in- 

 creasing population. It is the duty of every American 

 to get into a sympathetic attitude to all this work. 



407. Topics for Themes in Zoology and English. i. Give a report 

 of the United States Bureau of Fish and Fisheries. How is it organ- 

 ized? What are its principal stations? What work does it under- 

 take to do ? What are its chief publications ? 



2. Discuss similarly the Bureau of Animal Industry; the Bureau 

 of Entomology; the Biological Survey. 



3 . Give an account of one of the inland fish hatcheries and its work. 



4. Why are the vegetable feeding animals preferred for food 

 above the carnivora? 



