SUGGESTIONS ON LABORATORY WORK 50! 



CHAPTER VIII, IRRIGATION. Study the various parts 

 used in the overhead system of irrigation. 



CHAPTER IX, INSECT ENEMIES AND DISEASES. (i) 

 Study the various types of nozzles and pumps. (2) 

 Prepare spraying mixtures, unless this experience has 

 been gained in previous courses. (3) Make the neces- 

 sary applications for the control of insects or diseases 

 in the assigned plats. 



CHAPTER X, SEEDS AND SEED GROWING. (i) If the 

 course is offered in the fall, there will be abundant op- 



FIG. IO9. STUDENTS AT WORK IN THE GARDENS OF 

 THE PENNSYLVANIA STATE COLLEGE 



portunity for the selection, harvesting, cleaning and cur- 

 ing of seeds. (2) Make germination tests of old and new 

 seeds. 



CHAPTER XI, CONSTRUCTION OF HOTBEDS. (i) Practice 

 in painting and glazing hotbed sash. (2) Construct 

 frames. (3) Select and prepare the manure and fill the 

 pit. 



CHAPTER XII, CONSTRUCTION OF COLD FRAMES. If 

 possible the student should have actual experience in 

 frame construction. 



