5^4 HOT-HOUSE DISPLAVJD, 



ently to impart a proper heat therefrom to 

 warm the internal air in a requifite degree 

 till morning, when, aifo in frofly, cold, 

 cloudy, and foggy weather, it is necefTary to 

 make a moderate fire, and in very fevere 

 frolls, keep up a fire all day long, for the air 

 of the houfe mull: be always kept to a certaia 

 regular degree of heat, equal to that of the 

 hot countries, from which the plants were 

 originally obtained, and as a fure guide to 

 this, it is neceiTary to have a thermometer 

 fufpended in the middle of the Hot-houfe, 

 iiaving the proper degree of heat for the piae- 

 apple, [Jnunas) marked thereon, placing it 

 v.'ith the back towards the fun, that it may 

 be afFcaed only by the heat of the houfe, 

 and by the rifing tnd falling of the liquid 

 fpirit in the glafs tube, effeded more or 

 lefs by the power of the internal heat, as 

 above obferved, you will eafily difcover the 

 proper temperature, and requifite degree 

 thereof, neceiTary for the culture of the 

 {Ananas) or pine-apple, as before hinted; 

 and the heat proper for thefe plants is appli- 

 cable to the culture of moll, or all the other 

 tender exotics of this confervatory, b^ing 

 always careful never to raife the heat too 

 greatly by means of the fire, generally never 

 more than five degre^is over or under the 

 ftandard mark on the thermometer : in this 

 manner the fire is to be continued tvi^rj 

 night, ocz. till May, then, to ceafe making 

 fires far ihe Summer, till next Odober. 



As 



