264 GEOLOGICAL SURVEY “4 
ble, a hill-side should be selected. In Philadelphia it is sometimes found. cheaper. to have two kilns 
side by side, than to draw the lime and store it, when burned, When oue kiln is burned the lime 
is allowed to remain in it till sold out. In the mean time the other is in operation ; and this alter- 
nation is kept up, which saves one handling, and removal of the lime from the kiln. ¢ 
[ have prepared some plans of kilns, from the most approved structures, of this sort, which are 
here presented. ye 
Fig. 35. aw 
}, ee e 
SS 
—— Sa 
Fig. 35 is an exceedingly simple plan of a kiln used at Thomaston, in 1839.* Three arches are 
built of the limestone to be burned, into which the wood is thrust during the firing. The rest 
explains itself. 
, Fig. 36. 
: SCALE OF FEET. 12 
1 1 1 1) “Sey 1 ‘ n o n ' 
*Jackson’s Report. 
