APPENDIX xix 



TABLE XIII. 



SUGGESTIONS TO TEACHERS FOR ADDITIONAL 

 EXERCISES AND PROJECTS. 



THE following projects and field and laboratory exercises 

 will be suggestive to those who wish to further supplement 

 the text. These are arranged according to the numbers of 

 the chapters to which they are most closely related. They 

 may be taken up in connection with their corresponding 

 chapters if desired. 



CHAPTER I. PHYSIOLOGY OF PLANTS. 



1. Tie a piece of bologna skin over the top of a long glass 

 funnel tube from a chemical laboratory. Fill the bowl of the 

 funnel with dense sugar syrup. Place it with the membrane 

 beneath the surface in a glass of water. Then support the 

 tube in some way and observe the osmosis of the two liquids. 

 With a piece of rubber tubing splice on more glass tubing 

 and see how high you can conduct the liquid before the 

 action stops. 



CHAPTER II. PLANT IMPROVEMENT. WEEDS. 



1. Make a study of a fanning mill at a dealer's or at some 

 farm. Study the sieves and the fan. Try the machine with 

 a quantity of uncleaned seeds and note its work. 



2. Let home projects be started in the ear-row method 

 of improving corn, and in the hill-row method of increasing 

 the yield of potatoes. 



3. Make a list of bad weeds observed at your home farm 

 or elsewhere, seen hi the following places: (1) roadsides and 

 fence rows; (2) in grain fields; (3) in cultivated fields; (4) in 

 hay fields; (5) in pastures. 



4. Make a list of the ways you have seen for storing 

 seeds over winter. 



