Improved Kilns for huruiiiy Lime. 
143 
manner, except tbat the lumps are of larger size. The ends 
open into tlie chimney-flues, which are 2 feet square at the 
bottom anil 2 feet 3 inches square at the top. The skiveplates 
are 2 feet 6 inches square, and the chain attached to the skive- 
plate lever is carried over a roller in the kiln-pit, and is so 
arranged that the skiveplate can be opened or closed at either 
end of the kiln. 
Fig. 9. — View of Improved Perpetual Kiln. 
The kiln is lined with firebrick, 9 inches thick, for 4 feet 
above the fire-bars, and the whole of the work about the fire- 
holes is built with fire-brick. The kiln-pits should be con- 
structed with lean-to roofs, with louvre openings at the highest 
part to let out the heat while the lime is being drawn. A 
"P iron bar should be carried across the pits, supported at both 
ends ; on this a double roller runs backwards and forwards, 
carrying a link at the end of the spindle and terminating in a hook, 
from which is suspended an iron-wire basket, into which the 
lime is loaded to remove it to the store. The basket is drawn 
backwards by an endless line, and would be arranged to tip 
itself in passing over the partition between the kiln-pit and the 
store-shed. A similar bar and travelling carriage would also be 
used for loading the carts Irom the store-shed. 
The kiln is set in a similar manner to a perpetual kiln, more 
limestone or chalk being added at the top to replace the burnt 
lime, which is continually withdrawn at the bottom. It may 
also be set and burnt as an intermittent kiln, the whole charge 
being withdrawn by the hatchway at one time. Either a large 
