152 Orange and Lemon Trees, and Hot-house Flues. 



3. On the Management of newly-imported Orange and Lemon 

 trees. By Mr. William Moore, Gardener at East Ham, 

 Surrey. Dated Jan. 25th. 



The trees, as soon as received, were immersed half way 

 up their stems in water about 64° for twelve hours. They 

 were then potted, their stems wrapped round with soft hay- 

 bands, from the root to the bud ; the shoots from these buds 

 cut down to three eyes; and finally the pots plunged into a 

 bed of nearly spent dung, made up in the vinery. They were 

 regularly watered morning and evening, and the hay-bands well 

 moistened every time ; the water used was of 65°, the tempe- 

 rature of the house. In ten days they all began to push 

 vigorously ; excepting one plant, which was neither steeped 

 in water, nor wrapped round with hay-bands, and which re- 

 mained a month quite inactive, while the others had produced 

 shoots from four to eight inches long. Heat and proportionate 

 moisture, Mr. Moore concludes, are the grand agents of 

 vegetation. 



4. An Account of an Experiment, "which serves to show that 

 Hot-house Flues may draw very well without terminating in 

 an upright Shaft or Chimney. By Mr. Matthias Saul, of 

 Lancaster, Inventor of Saul's Fruit-gatherer (Encyc. ofGard. 

 § 1347.) and other Machines. Dated Feb. 7th. 



Mr. Saul's green-house flue always had the worst draught 

 in frosty weather, apparently from some defect in the upright 

 chimney. As an experiment, he made an opening into the 

 flue, and made a wood flue sixteen inches long (Jig 30. b). 

 " I found," he says, " the smoke came out with great force and 

 ran along the ground (e), and none came out at the chim- 

 ney (f). I then supposed my chimney (f) must be too small. 



