5 
11 Culture of Pelargoniums. Cut down the plants, pretty 
closely in August. When they have produced new buds, a quar- 
ter of an inch long, clear the soil from them, shorten their roots, 
and replant them in small pots of fresh compost; afterwards 
water, and enclose them in a cold frame. When they have fully 
recovered transplanting, give them full exposure, continue it 
till frost is expected, and then take them, for winter protection, 
into a green-house or airy sitting room. In spring, they should 
be repotted as frequently as the roots are found to have run 
freely round the inside of the pot. Pelargoniums (Geraniums) 
thus annually treated, will prove bushy and vigorous; and will 
flower longer, and more abundantly, than is usual. 
12 Heating by Hot Water. Wishing to diffuse the heat, in a 
sitting room, more regularly than is effected by the common 
grate, we had, in the building of it, a recess left in the wall, 
extending all along one side, to the right and left of the fire- 
place. This rece.ss opens 12 inches to the room; is 4^ inches 
deep in the wall; and one foot from the floor. The cavity 
thus made, receives the pipes, which pass behind the chimney- 
jiiece, from the boiler, at the back of the grate. They extend in 
the form here represented, and the space they occupy in the wall 
is fronted with a frame of wire lattice. The little l)oiler, a, is 
fixed behind, and close against, the cast-metal back of the grate; 
which metal back does not reach, as is usual, to the bottom of 
the grate, but w ithin 2 inches of it. The boiler is also fixed at 
a corresponding height, so that its bottom is equal with the bot- 
tom of the sloping back-plate alluded to; and thus a cavity of 
2 inches is left, which forms a flue, from the bottom of the fire, 
that is continued under and round the back of the boiler, and 
ultimately communicates with the chimney. To prevent a cur- 
rent of air into this flue, through the bottom of the grate, a solid 
iron plate is laid on it. The boiler is 14 inches long; 4 inches 
deep; and 6 inches wide, from back to front. Each pipe, which 
is 3 inches diameter, is horizontal from its union with the sujiply 
pipe at b, to its returning point at c; thence to the boiler, at d, 
an inch fall is allowed. The supply pijie, b, may be carried to 
IM 
