288 Principles of Plant Culture. 



The bulb (352). Dissect bulbs of the onion, tulip, 

 lily, etc., ascertaining their structure and finding the 

 embryo flowers. 



The cold-frame (364). Require the students to make 

 a drawing and write a description of a cold-frame, from 

 a model furnished them. 



The liotbed (365). Let the students assist in making 

 a hotbed after the plan described. Also let them note 

 the temperature of the soil within the frame on sev- 

 eral successive days after the bed is finished, and give 

 them instruction in ventilating the hotbed. 



The propagating bed (368). Require the students to 

 make a propagating bed in the greenhouse, after the 

 plan described. 



Stem cuttings (373-375). Let the students make 

 cuttings from the stems of the grape, currant, etc., 

 and plant them, both in the propagating bed and in 

 the garden. 



Root-cuttings (376). Give a lesson in making root- 

 cuttings of the raspberry or blackberry, in packing the 

 same for winter storage, and in planting them in the 

 propagating bed and in the garden. 



Green cuttings (380-381). Give a lesson in making 

 and planting cuttings of coleus, geranium, rose, etc., 

 followed by instructions in the care of green cuttings 

 in the propagating bed. 



Leaf cuttings (382). Give a lesson in making and 

 planting leaf cuttings of the begonia. 



Grafting wax, etc. (387-389). Give a lesson in mak- 

 ing grafting wax, grafting cord and -grafting paper, 

 as described. 



Whip-grafting (390-391). Give several lessons in 

 whip-grafting including grafting both of the stem and 

 of the root. 



Cleft grafting (392). Give one or two lessons in 

 cleft grafting. 



Side grafting (393). Give a lesson in side grafting, 

 as described. 



Budding (394). Give one or more lessons in bud- 

 ding, as described. The bark on the stocks may be 



