PROPAGATING 73 



never too wet, and yet never dry. All the attention 

 required is to daily fill up the keg with water, so that 

 a stream of fresh liquid takes the place of that which 

 flowed through the frame the day before. 



The reason for both introducing and collecting the 

 water by perforated pipes, instead of one larger inlet 

 and outlet, is to prevent the water from flowing, as 

 it readily would, in one small channel, thus coming 

 in contact chiefly with one part of the rubble, instead of 

 being evenly distributed over the whole area. 



It is a convenience to connect a%hort length of rubber 

 hose to the outlet pipe, where it projects through the 

 wall, and this can be raised or depressed, so as to cause 

 more or less water to remain in the frame, should very 

 hot dry weather demand it. 



The glass light I keep on the frame each night and 

 whenever heavy rain is likely, but so raised above the 

 sides on which it runs that a current of air is continually 

 passing over the pots. This is very easily arranged for 

 by making the sides of the frame three inches higher 

 than the front and back sills, thereby forming an air 

 space three inches by three feet six inches or whatever 

 the width of the frame may be both at the back and 

 front. 



When the " light " is off, I replace it with a wooden 

 frame covered with wire netting so as to keep the birds 

 from investigating the luscious points of the seeds, just 



