A Chapter on Greenhouses. 



195 



position left. In connection with the ornamental entrance, it has an enclo- 

 sure with inside-doors, avoiding all cold draughts of air on entering the 

 house in winter. By reference to the ground-plan accompanying, it will 

 be seen lliat the walks are serpentine in form, the side part or shelves being 

 made in the same manner as described in our August number. 



The centre is laid out as in a rustic grotto, aquarium, and rocker}'. 



At one end, a glass partition is erected across the house on a line wilh 

 a pair of rafters, at the end, and not enclosing any of the cupola, which is 



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^^^^^ij^ - ^^^^j^^^. 



intended for plants that require more heat than the ordinary temperature of 

 the greenhouse. The aquarium is formed on a level below the walks by 

 excavating the soil to give sufficient depth for the water, and building up 

 masonrj- for the sides to hold the water. The grotto is formed of rustic 

 stone, laid up in as angular and zigzag a manner as possible, or as the size 

 of the stone will admit, and well packed in prepared soil. At the front, it 

 is carried up from six to eight feet high ; and the stone is laid in such a 

 manner as to throw a ragged arch over and around the basin below, forming 



