THE 3IAGAZINE 



OP 



HORTICULTURE. 



AUGUST, 1841, 



ORIGINAL COMMUNICATIONS. 



Art. I. Cursory JS'o/es on some of the Gardens and Fruit 

 Establif'hments in the vicinity of London; made during a 

 visit in the autumn of 1840. By William Kenrick. 



At the celebrated fruit establishment of Mr. Wilraot, at 

 Isleworth, near London, the hot-houses and vineries are 

 warmed by means of hot water, but by a new and beautiful 

 system, which is called the Penn system, and which, accord- 

 ing to ]Mr. Loudon, bids fair to supersede all other systems 

 and modes. From my observations, on a transient visit to 

 that establishment, a short account of the system is here sub- 

 joined. 



The house, the subject of that examination, was eighty 

 feet long, sixteen feet broad in the clear, and fourteen feet 

 iu the highest part. Within the main body of the house, and 

 in the back part, and extending the whole length, is a narrow 

 air chamber, formed of inch boards. This air chamber ex- 

 tends from the foundation below, to the height of about three 

 feet above the floor, and may be about thirty inches in width. 

 Throughout the whole length of this air chamber the hot wa- 

 ter circulates through four cast iron pipes, each four or five 

 inches in diameter, and placed at the distance of three or 

 four inches asunder. These pipes are elevated at different 

 heights, one above another, obliquely, or like stairs or steps; 

 the two uppermost communicating with the tops of the boiler, 

 and also of the cistern, both which are placed at opposite 

 VOL. VII. — yo. VIII. 36 



