THE CALCEOLARIA HOUSE. fac 
difficult plants to grow well—at least this is the com- 
plaint of amateurs. ‘ Ah!’ they say—‘ we like them, but 
they are so much infested with or liable to the insect ; ’ 
so they give up the idea of growing them. 
I know very well that to grow either of them in a 
mixed collection of plants is far more difficult than it is 
to grow them ina house by themselves. This is why I 
particularly wish to impress upon the reader the neces- 
sity of devoting a house almost entirely, if not quite, to 
the exclusive growing of these and some other plants, 
as complete collections of the same species and their 
varieties. The difference required in the treatment of 
the various genera call aloud for the exclusive devotion 
of compartments of houses, or departments devoted solely 
to each and itsallies. No one can grow Geraniums and 
Calceolarias and Cinerarias all together at one and the 
same time; by attempting to do so a miserable failure 
is the result, and extorts complaints against these indi- 
vidual species. Glass is now cheap, and by following 
up my method in the construction of houses, and by the 
economical way of glazing, heating, &c. much larger 
houses can be built for the same prices usually paid for 
places half the size. I can guarantee this, and I am 
fully prepared to give full illustrations and detailed 
estimates with practical information how to do it. 
The house illustrated above, which is precisely the 
same as for the forcing of the Pink and Carnation, costs 
about half the amount that most professional builders 
charge for the construction of a similar place. I see by 
the price lists of various builders I have now by me that 
such a house complete will cost not less than 155/., 
whereas my estimate is 77/. 18s. complete, without the 
stage for the plants. Then why not devote a house to 
