SUGGESTIONS ON LABORATORY WORK 503 



mercial enterprise in which science is brought to bear 

 at every point. Food and moisture requirements are 

 considered; planting distances determined; habits of 

 growth studied; insect and fungous enemies combated 

 and products harvested and prepared for market. 



The gardens should not be larger than can be properly 

 cared for by the student in the time available for this 

 work; 20 x 50 feet is about right for a two-hour labora- 



FIG. IIO. STUDENTS AT WORK IN THE GARDENS AT 

 THE PENNSYLVANIA STATE COLLEGE 



tory period weekly. Much of the work will be done at 

 odd times by the students. This is important, because 

 rainy weather or an excessive supply of soil moisture 

 often prevents work at the scheduled hours. 



No allusion has been made in this chapter to the sys- 

 tematic study of vegetables. The student gardens, how- 

 ever, afford a large amount of excellent material for this 

 work, but such study should be treated in a separate 

 course, as Indicated in the introductory remarks. 



