76 PLANT PROPAGATION 
house must also be provided with shading. Canvas is 
an excellent material for the purpose, and it can also be 
used during sharp frosts. In the spring, when the sun 
becomes too powerful, a second shading could be placed 
inside directly on the lights. Two tanks are required, 
one on the stage receiving heat for propagating 
aquatic plarits, and another for watering purposes. Of 
course, all rain-water should be collected, and the water 
in the tank must always be kept at the house tempera- 
ture. A larger case could also be arranged at one end 
of the house for big-growing plants which require a very 
close atmosphere. Room near to the door should be 
allowed for a potting-bench, for as soon as the plants 
are rooted they require to be potted up, and it would be 
very detrimental to take them into a cold place to do 
this. The dimensions given on the drawing indicate a 
very suitable house. It could easily be built 1 foot 
lower, thus making it easier to heat, but in most 
respects the illustration will be found a trustworthy 
guide. 
