CUTTA GE. 



Fig. 33. Simple Propagating-oven. 



are sometimes built with permanent propagating frames of this 

 character throughout their length. 



In all the 

 above a p p 1 i - 

 ances heat i s 

 obtained from 

 the sun or from 

 the bench-pipes 

 or flues of a 

 greenhouse . 

 There are vari- 

 ous c o n t r i - 

 vances in which 

 the heat is ap- 

 plied locally, 

 for the purpose 

 of securing 



greater or more uniform heat One of the simplest and best 

 of these is the propagating-oven shown in Fig. 33. It is a glass 

 covered box about two feet deep, with a tray of water beneath 

 the soil, and which is heated by a lamp. A similar but some- 

 what complicated apparatus is illustrated in Figs. 34, 35, 36 

 This is an old form of oven, which has been variously modified 



by different operators. Fig. 

 34 shows a sectional view 

 of the complete apparatus. 

 The box, A A, is made of 

 wood and is usually about 

 three feet square. L is a 

 removable glass top. B 

 represents a zinc or gal- 

 vanized iron tray which is 

 filled with earth in which 

 seeds are sown or pots are 

 Fig. 34- Propagating-oven. plunged. C is a water tray 



to which the water is ap- 

 plied by means of a funnel extending through the box. A lamp, D, 

 N. B 4 



