294* ON THE CULTURE 



being open, the water will run out gently each 

 way ; but if a vessel filled with water be elevated, 

 and fixed to one end of the pipe, the water will 

 run out at the other end with a rapidity propor- 

 tioned to the elevation of the vessel. 



The case is similar ; the flues in hot-houses 

 are carried a great length from the fire-place in a 

 horizontal position ; and when the fire-place (which 

 is frequently the case) is too near the level of the 

 flue, the fire will necessarily return back when the 

 wind is in certain points. To prevent this, the 

 fire-grate should be placed two feet below the 

 level of the bottom of the flue ; and eighteen 

 inches being a proper depth for the fire-place, the 

 top of the fire-place will be six inches below the 

 bottom of the flue, which will be sufficient to give 

 the fire a good draught. — Fire-places constructed 

 in this manner I have never known to fail, but 

 have found them draw well at all times, and in all 

 seasons. 



On steaming of the Pine-stove, §c. 



The method of steaming of Pine-stoves and 

 forcing-houses seems to stand forward among the 

 modern improvements of gardening. 



The powers of steam are certainly astonishingly 

 great, and have been found of wonderful utility 

 in the line of mechanic arts ; but it is exceedingly 

 doubtful whether the use of steam in Pine-stoves 

 and forcing-houses will be possessed of so many 

 advantages, and turn to so good account, as some 



