376 FORCING DEPARTMENT. 



CONSTRUCTION OF THE PINERY. 



The annexed Ground Plan, Elevations, and 

 Section, (Plate 20,) will illustrate the principle 

 upon which the Pine-House is erected. It is ex- 

 ecuted from the designs of W. Atkinson, Esq. 

 This house is 65 feet long, and 13 feet wide, 

 in the clear ; and is divided into two divisions. 

 The sashes and rafters are wood, and fixtures ; conse- 

 quently air is admitted by the ventilators D. D., that 

 are placed in the top of the back wall, and along 

 the centre of the front wall, which, together with 

 opening the doors, will admit a sufficiency of air in 

 the Summer season, for the Pine Apple. The house 

 is heated by hot water, with separate boilers and pipes 

 to each division ; the boilers A. A. are placed in are- 

 cess about the centre of the back wall, the dimensions 

 of which arctwofeetsix inches long, one foot six inches 

 wide, and one foot eight inches deep, of an oblong 

 square. There are two pipes B. B. (see Section,) 

 attached to each boiler, one near the top, and the 

 other at the bottom ; the upper pipe is round, until 

 it reaches the front of the house, when it forms a 

 square of 12 inches broad by four inches in dia- 

 meter ; the lower pipe is circular, and four inches in 

 diameter. These pipes convey the water from the 

 boilers across the ends, and along the front of the 

 house to the reservoirs D. D., (see Ground Plan,) which 

 are of the same dimensions as the boilers, and are 



