AND CONSEEYATORT. 



23 



the plants soon recover from it when the growing d;vvs of 

 spring return. A merely common gas-flame is, however, not 

 to be tolerated in a plant house, except in the way of a few 

 small jets to aftord light, and these are always allowable, the 

 minuteness of the combustion exercising so minute an influence 

 as to be practically of no consequence whatever. 



The best form of apparatus is that which consists of boiler 

 and circulating pipes, and it is always advisable to place the 

 boiler in a separate apartment, even if a portion of the plant 

 house has to be screened off" by means of glass for the purpose. 

 However careful we may be to provide ready exit for the pro- 

 ducts of combustion, a gas-flame of suflScient power to afford 

 the amount of heat required must prove prejudicial to plants 

 when in close proximity to them. It commonly happens, 

 however, that the house best adapted for gas-heating occupies 

 a position adjacent to an entrance-hall or some other apart- 

 ment, in which the boiler can 

 be placed for both use and orna- 

 ment. It must not be forgotten 

 either that a boiler adapted for 

 the purpose can be placed, as well 

 beneath as beside the conservatory 

 to be heated, for the pipes in 

 which the water circulates may 

 range vertically or horizontally 

 at discretion, provided the work 

 is well done. In many cases a 

 gas apparatus might be adapted 

 to heat a bath-room and a plant 

 house, and afford the additional 

 convenience of management with- 

 in doors, without any occasion for 

 exposure to the night air in the 

 winter season. 



A simple and eflfective form 

 of gas-stove is that known as 

 Trotraan's. which is manufac- 

 tured by iNIr. Trotman, of Isle- 

 worth. The stove stands about 

 thirty inches to the top of the 

 lid; the diameter nine inches.. 

 The centre to within six inches 



