Appendix— Syllabus of Laboratory Work. 287 



Stratification of seeds (169). Perform the process, 

 as described, in boxes or large flower pots. 



Sun-scald (185). Require each student to make a 

 lath tree protector (Fig. 59). 



Winter protection of plants (201). Protect half- 

 hardy shrubs by wrapping them with straw or covering 

 them with earth. 



Foretelling frost (206). Devote an exercise to the 

 use of the psyehrometer and the computation of the 

 dew point. 



Plant protectors (278). Require each student to 

 make at least one plant protector, as shown in Fig. 67, 

 patterns for which are to be furnished. 



Kerosene Emulsion (294). Let each student make a 

 given quantity of the kerosene emulsion after one of 

 the formulae given. 



Spraying pumps (304). Give at least one exercise 

 to the construction and use of spraying pumps and 

 nozzles. 



Prevention of grain smuts (325). Require the stu- 

 dents to treat a quantity of oats with formalin as de- 

 scribed. 



Bordeaux Mixture (329). Require each student to 

 make a stated quantity of the Bordeaux mixture after 

 the formulae given. 



Propagation by seeds (344). Instruct the students 

 in the use of the hand seed-drill and broadcast sower. 

 Let them ascertain how miuch clover seed the broadcast 

 machine is sowing per acre, by laying on the ground or 

 floor several sheets of paper, exactly one foot square, 

 painted with glycerine to catch the falling seeds. Hav- 

 ing learned the average number of seeds deposited per 

 square foot with a given rate of motion of the machine, 

 let the students compute the number of seeds sown per 

 acre, and reduce this to ounces. The number of clover 

 seeds in an ounce may be ascertained by dividing an 

 ounce of seed among the students for counting. 



Propagation by layers (349). Instruct the students 

 in layering canes of the grape, and in mound-layering 

 the stems of the gooseberry. 



