58 
GENERAL CULTURE OF STOVE PLANTS. 
£. s. d. 
For Boilers 5 cwt. at 205. per cwt. . ^ . . . . . 500 
Piping and Elbows. . . . . . . . •• 1140 
Nuts and Bolts 30 lb. at 5d. . . . . . . . 0 12 6 
Canvass, Red and White lead, &c., . . . . . . • 0 12 6 
£17 9 0 
If more houses than one to be heated, the additional expenses of the boxes . . 3 0 0 
Stopcock for each . . . . . . . . . 0 7 b' 
£20 16 6 
The pipes may be had of Messrs. John Davis, & Sons, or at the Birmingham coal 
company's foundries, Tipton, Staffordshire. All the difficulty lies in sending a 
correct statement of the length of the elbows, and the proper quantity of six feet 
and nine feet pipe wanted. You may then put them together yourselves, allowing 
a fall of half an inch in every nine feet of pipe, each pipe to be four inches in 
diameter inside, and to be fastened at each joint by four nuts and bolts. A nine 
feet pipe of four inches bore, thickness of metal three-eighths, weight 1 cwt. 1 qr. 
10 lb., at 10*. per cwt.. Elbows 12*. per cwt. Boiler as stated before ; nuts and 
bolts, 4 to the pound, at 5d. Red and white lead, canvas, labour, &c., to each joint 
^d. The plan of the boiler will answer for any number of houses, if it and the fire 
place be made wider and longer, according to the power required. 
Since we wrote last on this subject Mr. Saul of Lancaster has made another 
experiment by removing the two pipes 8,8, vol i. p. 136, and fixed one pipe eighteen 
inches long, and four and a half inches diameter, inside measure (fig. B.) He 
enlarged the fireplace A, and made the grate flat, as C ; but to his great astonish- 
ment he was never able to obtain one half the heat, although the size of the fire- 
place was increased so much. 
It is therefore quite clear, that small tubes, or pipes, placed in the same way as 
in vol. i. p. 136, are preferable to one large pipe, as shown in the present figure, B. 
Also it is a great advantage for the grate to be on an inclined plane, and not 
level as, C. 
Mr. Saul was so convinced of this, that he removed the pipe B, and replaced 
the two pipes, also the inclined plane, and by these means, he was able to obtain 
