OF SOUTH CAROLINA. 269 
Figure B. is a front view, showing the relative position of 
the cranes, which are represented as turned aside. The chain 
is seen winding around the axle. It is evident that the men 
must pass to the opposite side of the wheel as each box is 
drawn up. 
jj. Represent two views of the boxes, which are square, 
and may be 21 inches every way ; they will contain nearly 6 
cubic feeteach. [hey are suspended by two pins placed a lit- 
tle below and to one side of the centre, so as to turn over and 
and empty themselves, when a small iron pin, seen at /, 
is withdrawn. ‘Three men can be employed to advantage at 
the wheel, two remaining on, whilst the third gets off to land 
the box. Should the box not be heavy enough, the diame- 
ter of the axle can be enlarged, so as to make up in time 
what is lost in weight. Should it be too heavy for the force 
employed, the diameter may be lessened. 
Burnina Marv ror Lime. 
On certain parts of the coast of England, accumulations of calcareous sands are found, that have 
been applied extensively to the adjoining lands. ‘The sands contain 60 per cent of carbonate of lime, 
and to extend their economic value still further, a method of converting them into lime has been 
adopted, it is said, with entire success. Now this is precisely what is wanted for burning our rich 
marls, and with such means, the blue limestone would have no superiority over them. 
The furnace consists of the common reverbatory furnace, in use at the iron works. The follow- 
ing is a plan, from the dimensions of those used in England. 
Fig. 39. 
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