PROPAGATING DEVICES. 



55 Zinc propagating-tank. 



at that point. Various devices are employed for the pur- 

 pose of securing these advantages to the best effect. These 



are usually 

 double pots, 

 in one of 

 which water 

 is placed. A 

 good method 

 is that rep- 

 resented in 

 Figure 56, 

 which shows 

 a pot, b, 

 plugged with 

 plaster of 



Pans at the bottom, placed inside a larger one. The 

 earth is placed between the two, drainage material occu- 

 pying the bottom, a, and fine soil the 

 top, c. Water stands in the inner pot 

 as high as the dotted line, and feeds 

 uniformly into the surrounding soil. 

 The positions of the water and soil 

 are frequently reversed, but in that 

 case there is less space available fo r 

 cuttings. A double pot, with moisture 

 supplied in a surrounding cushion of 

 sphagnum moss, is seen in Fig. i. 

 Neumann's cutting-pot is shown in 

 Fig. 57. This contains an inverted pot in the center, a, 

 designed to supply drainage and to 

 admit heat into the center of the mass 

 of soil. A good method of striking 

 difficult subjects is as follows : Fill a 

 saucer with moss. Upon this place 

 an inverted flower-pot. Insert the 

 57. Ne ma n s * tin z- cutting through the hole in the bot- 



56. Forsyth's cutting- 

 pot. 



