THE WALTONIAN CASE. 



269 



the smoke out through E ; F, lamp for heating boiler ; jET, 

 tap to draw off water. 



The heat for a Waltonian case should be about seventy 

 degrees ; when the sun will raise this heat, the lamp may 

 be dispensed with. In managing the case, it is important 

 the sand should be kept constantly moist, or the heat will 



FIG. 5. 



not rise freely ; any excessive moisture may, however, lead 

 to damping off. 



It is a good plan to sprinkle a little silver sand over the 

 surface of the pots containing the cuttings ; it is a great 

 safeguard against damping off. It is also important to sow 

 the seeds in small pots the smaller the pots the greater 

 the safety. 



23* 



