74 ELEMENTS OF AGRICULTURE 



31. Starch in Leaves at Different Times. 



Collect leaves of plants in early spring and in late fall, preserve 

 in alcohol. Also collect leaves at daybreak and in the afternoon, and 

 preserve. Test each for starch. Explain the results. 



COLLATERAL READING 



Chemistry of Plant and Animal Life, by Harry Snyder. 



Physics of Agriculture, by F. H. King. 



Fertilizers, by E. B. Voorhees. 



Elementary Exercises in Agriculture. Office of Experiment Sta 

 tions, Bulletin No. 186, pp. 17-26. 



A Secondary Course in Agronomy. Office of Experiment Stations, 

 Circular No. 77, pp. 25-26. 



