HEATING. 15 



pies -will always have a fresh and healthy atmosphere — a 

 condition which will not only impart strength and vigour 

 to the plants, but will also be far more enjoyable to the 

 cultivator. Some amateurs may think we have attributed 

 too much importance to this question of ventilation. We 

 recommend those who entertaiu such views to observe 

 closely and contrast the condition and appearance of plants 

 in well-ventilated and in ill-ventilated houses, and we feel 

 ■convinced they will very soon acknowledge that we are 

 correct in saying that ventilation is a point of vital im- 

 ^jortance. 



HEATING. 



|UR remarks upon this subject at page 8 in Stove 

 and Greenhouse flowering Plants, may be re- 

 peated here with advantage. Stoves for the cul- 

 tivation of ornamental-leaved plants should be kept at a 

 temperature ranging from 68° to 80° during summer, and 

 from 60° to 70° during winter. An intermediate house is 

 also very useful where a large and varied collection of 

 plants has to be accommodated. By an intermediate house, 

 we mean to imply a house in which the temperature ranges 

 between that of a stove and that of an ordinary green- 

 house. 



Premising that as yet nothing has been discovered to 

 supersede, or even to equal, a good hot-water apparatus for 

 heating plant houses, the first consideration is a boiler — 

 what kind, or whose boiler is the best ? This is a question 

 not easily settled, for hot-water boilers are now made of 

 shapes and patterns without end. Most cultivators, how- 

 ever, have some predilection in the matter, and as very 



