24 GREENHOUSE CONSTRUCTION AND HEATING. 
a house of almost any kind, if well heated, will do, provided. 
only that it is sufficiently light and not too lofty. 
Chrysanthemums. — These also best succeed in a 
moderately roomy, airy, and well ventilated structure ; but 
the plants should not stand too far from the glass, as those 
of the incurved varieties in particular frequently do not 
expand their buds properly unless these are within a short 
distance of the glass. Hence, a similar class of structure to 
that described for tomatoes will suit chrysanthemums 
Fig. 18. 
admirably, and, indeed, houses that have been cropped with 
tomatoes during the summer are frequently utilised for 
housing and flowering a batch of the former plants in the 
autumn, after the ‘‘toms” are over and have been cleared 
out. The plants may be stood on boards or stout slates, or 
on a bed of ashes put down on purpose. Where structures 
that would otherwise be suitable and useful for housing 
chrysanthemums in the autumn are fitted with staging, to 
accommodate pot-plants of any kind during the summer, 
this (the staging) should be constructed so as to be easily 
