HOME PROJECTS 331 



20. Cost of fertilizers. 



21. Cost of plowing, planting, cultivating, harvesting, etc. 

 Figure your own time 25 cents an hour and the time of the 

 horse 20 cents an hour. 



22. Total value of crop, stover, and corn. 



23. Net profit or loss of the project. 



24. What should be the next crop on your plot? 



For fuller details on this subject, see "Corn Growing," by Nolan 

 and Greene, published by Row, Peterson & Co. 



HOME PROJECT 5 



SOME INSECT STUDIES* 



Provide yourself with an insect net, cyanide bottle, collect- 

 ing cans, lens, and mounting boxes or cases. 



To collect and preserve insects a cyanide bottle is needed. 

 Get a wide-mouthed bottle and a good cork to fit it tightly. 

 Put in the bottom of the bottle an ounce of potassium cyan- 

 ide broken into. lumps about the size of lima beans; add 

 enough saw-dust to cover the lumps and pour in plaster of 

 Paris, mixed to a consistency of thick cream, covering the 

 whole with a layer about a quarter of an inch thick. In a 

 few minutes the plaster will harden. Drop an insect to be 

 killed into the bottle and cork immediately. The fumes of 

 the cyanide coming up through the plaster kill the insect. 

 (Avoid breathing tliese fumes, and keep the bottle corked.) 

 Label the bottle and keep it away from children. 



*See Hodges' "Nature-Study and Life." 



