86 THE ART AND PRACTICE OF LANDSCAPE GARDENING. 



and display of the larger foliage plants. Next follow a late vinery, 

 K, and a muscat house, L, each 16 ft. wide, each heated by six 

 rows of 4 in. pipes, of which four are 2 ft. from the front and two 

 of them the same distance from the path. The roofs are wired, 

 and shelving is fixed against back wall. A late peach house, M, 

 also 1 6 ft. wide, succeed, with trellis frame as before described. The 

 heating consists of eight rows of 4 in. pipes, two rows next the 

 outside wall, a group of four rows inside trellis frame, and two rows 

 next the path. We now come to a propagating greenhouse, 9 ft. wide, 

 with stage heated by a flow and return pipe under same, with shelf 

 against back wall, with a frame pit, O, 5 ft. wide, in front, similar 

 to those previously described. P is a span-roof house, with central 

 stepped stage, with tank under the stages next the walls, and hang- 

 ing shelf. It is heated by four rows of 4 in. pipes under the 

 outside stages. The heating is provided by two low-pressure boilers 

 fixed in boiler house, each capable of heating 3,500 ft. of 4 in. pipe, 

 and so arranged that they can be worked independently or coupled. 

 There is a main flow and return pipe laid under the perforated 

 iron pathway running the whole length of the houses, from which 

 pipes, controlled by separate valves, are taken to the several 

 divisional houses. All water gathered from the roof is conducted 

 to either the tank fixed under the greenhouse, P, stage, or to an 

 open tank built at back, Q ; and pumps connected by lead piping 

 with these tanks are fixed in each house. The front brick walls 

 of the vineries and peach houses are built on arches, so that the 

 roots may penetrate on either side. The front upright lights open 

 and shut by simultaneous opening gear, as also the top ventilating 

 lights, which are 2 ft. 6 in. long, in the roof. At the back are to 

 be seen an open tank, Q, with roof over and enclosed by iron 

 railing, and, as already referred to, a mushroom house, with slate 

 shelves resting on brick supports, and heated by a flow and return 



