ECONOMIC ZOOLOGY 507 



best growth and with the least injury to the partly grown in- 

 dividuals, 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 increasing population. It is the duty of every American to 

 get into a sympathetic attitude to all this work. 



511. Topics for the Library. i. Give a report of the United States Bureau of 

 Fish and Fisheries. How is it organized? What are its principal stations? 

 What work does it undertake 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 ? 



5. Why are woolen fabrics warmer than cotton or linen? 



6. Will the vegetable food or the animal food that can be produced and sup- 

 ported on ten acres of ground go further in supporting human life ? Discuss 

 carefully. 



7. Do you think the tendency will be to increase or to decrease animal culture 

 as population begins to press upon the resources of the soil? Give the biological 

 reasons fully. 



8. What are the chief arguments against vivisection and experiments on living 

 animals by investigators? What the chief arguments in favor of it? 



9. Discuss the various products of the hog, utilized in the packing houses. 



10. Discuss the animals that frequent human habitations, becoming pests 

 in some degree. Give the habits of life of each so far as you can by study and 

 reference. 



1 1 . Discuss with some care what is known of the history, the different varieties, 

 the use, etc., of some of the domestic animals, as the dog, the horse, the fowl, the 

 ox, and others. 



12. Discuss human slavery as a zoological phenomenon. To what is due the 

 tendency to abolish it? 



