73 
The Amateur Propagator . 73 
On this 'netting, immediately over the lamp, is laid a roofing slate 
(A, Fig. 4) to take the heat. Below the netting is the air chamber, nine 
inches deep, and next this the lamp chamber, so made that the top 
of the lamp chimney is level with the bottom of the air chamber. The 
receiver of the lamp is dropped through a hole cut in the bottom of the 
lamp chamber, otherwise it becomes dangerously heated. It is also necessary 
to bore three or four half-inch centre-bit holes in the bottom of the latter, 
also one or two in the air chamber, to admit air. The entire frame, with the 
exception of the lamp chamber, is lined with carpet. As will be seen, there 
is no water tank, the needful moisture being supplied by keeping the cocoa 
nut-fibre refuse damp. If the lamp is kept properly trimmed no unpleasant 
fumes will be emitted, and an average temperature of 65 to 70 degrees may 
be maintained at a cost of 6d. per week for oil. This propagator can be used 
indoors or out. 
Another and more substantial form of propagator is represented by Fig. 5. 
This, too, may be made as easily as the preceding form; but the cost will be 
about double. This has a great advantage over the other kind in having a 
water tank, by means of which a more steady and uniform heat can be 
