X INTEODUCTION. 



" The flagstones should be laid so soon as the rock is 

 completed, and the waterworks should be tried to see that 

 they work satisfactorily. The flagstones should be un- 

 dressed, and if one side be rougher and uglier than the 

 other, we would lay that side uppermost. We would fix 

 the heating apparatus next. A boiler would be wanted a 

 twenty-four-inch wrought-iron Monro's cannon boiler will 

 shoot out ample boiling water into the 500 feet of four-inch 

 pipe we would attach to it. This done, we certainly would 

 try it to see that it worked well, of which we have no doubt. 

 The roof should now be put on. The rafters should be 

 15 feet long, 7 inches by 3 in thickness (that is one sort); 

 but we would have another 15 feet long, 4 inches by 2J. 

 Both these should be ploughed three-quarters of an inch 

 deep by half an inch wide for the glass to rest on, on 

 one of the narrow surfaces, which side, of course, would 

 be placed upwards. The ridge-tree should be 8 inches 

 by 2^, and should be grooved its entire length for the 

 glass to fit into, for we would use no cappings. The 

 wall-plates 12 inches by 2 J in thickness ; and we would 

 have a groove in these on the under side, half an inch 

 from the outside edge, to prevent from following the 

 wood the water from the roof that should fall into the 

 spouts : if not grooved, the water follows the wall-plates 

 and runs down the walls. The wall-plates should project 

 exteriorly 1^ inch. The south end should be sashed for 

 glass, the other end should be walled-up of brick or stone. 

 At both ends let there be a ventilator 4 feet by 3, fixed 

 as near the top as possible, one of glass, the other of wood, 

 and have them to work on a swivel. 



" There should be double the quantity of rafters of the 

 smaller size to what there is of the other or larger kind. 



