FROM DIFFERENT APPARATUS. ,1 



receptacle for the coal of greater Length lhan it has breadth 

 or depth, by which the body of coal is not as much heated, 

 and requires to be replenished more frequently to maintain 

 the relative position of the coal, necessary to continue the 

 combustion. A much better shape, and which would requun 

 less coal at any one time, would be in the proportkaa of twelve 

 inches deep, to eight inches square at the top. and gradually 

 diminished to six inches at the bottom, by which the heat 

 generated in the combustion of the coal at the lower part of 

 the grate, in its passage to escape into the chimney, would 

 come in contact with nearly the whole body of coal, and keep 

 it heated, which cannot be the case in the former shape, sup- 

 posing the contents of the two grates, and the coal in each to be 

 equal; and if we suppose them to be only half filial with coal, 

 the position of that in the deep grate, will be eery favourable 

 for combustion, although less in quantity; while that in the 

 shallow grate, from the unfavourable situation in which it i< 

 placed, would scarcely burn at all. The advantage of placing 

 the body of coal in a deep grate, asdescrihed. may he illustrated 

 by the well known fact, that a stick of wood burns much man 

 rapidly in a vertical, than in a horizontal portion, and for the 

 reason already described. 



Being Well aware of the strong predilection in favour ol 

 those constructions which will permit tin- burning body to be 

 seen, which, with other reasons, prevents the not of close stoves 

 in many instances, and particularly where elegance is required, 

 the necessity is apparent, thai sonic new eonstruetion should 

 be devised, which can he substituted for the open urate, that 

 will obviate the difficulty, not only of cousuming anthracite 

 coal in small quantities, lor rooms of small dimensions. but. 

 what is a still greater objection made to its use generally, that 



the quantity cannot lie varied to meet the changes in tie tl in 

 perature of the atmosphere. 



In the plan which 1 will venture to suggest, a partial com 

 promise must lie made in tie- first particular Stated, but all th< . 

 others may be realized. 



In those instances where simplicity of construction i v nquir 



