202 NATURE STUDY AND AGRICULTURE 



well be studied in detail in connection with the study of 

 fisheries in geography. 



The life history of the mosquito may easily be worked 

 out either in the spring or fall. Set a jar or pail of rain 

 water out of doors where it will not be disturbed. The 

 mosquitoes will find this and deposit their eggs in it. By 

 looking every morning you may be able to find the eggs 

 like bits of soot floating on the water. If you do not suc- 

 ceed in finding the eggs before they hatch, you will be able 

 to find the wrigglers that batch from them. Put a num- 

 ber of these in jars or tumblers and have the children 

 watch from day to day and report on what they see. 

 After a few days keep a cover over the top of the jar to 

 prevent the escape of the full-grown mosquitoes. 



