OF THE PINE-APPLE. 



293 



that of common air,) naturally makes their direc- 

 tions tend differently. 



We know, that if a pipe filled with water be 

 placed in an exact horizontal position, both ends 



" I have made the following observations in regard to the 

 profits attending this mode of practice. s. d. 



To digging one load of stone - - 3£ 



To carriage of ditto - - - - -16 

 To coals to burn the above - - 8 8 



To a boy 10 days' work at breaking the stone, 

 attending the fires, and doing other jobs, 



15 5} 



To 5 quarters of lime, worth - - - 17 6 



2 0£ 



" Here is, you will observe, a small balance in favour of this 

 mode of practice, exclusive of ten days' fire-heat in our forcing- 

 house. And this was done when I only worked the kiln at 

 nights and mornings ; but when we work it all day, by letting 

 the lime out at the sliding grate, and by adding coal and stone 

 at the top, we can then burn a quarter in a day, and the boy 

 can manage to break stone and coal, and attend the kiln, with- 

 out any other assistance. Besides, there is another advantage 

 when we burn all day ; for the kiln, by becoming red hot, limes 

 the stone more rapidly, and I judge that l-5th less coals will do 

 the last case. 



" I shall beg to observe, that we abound in lime-stone here ; 

 but in this inland part of the country, coal is a most expensive 

 article. 



" I have never heard of any other kiln of this kind in England. 

 Lord John told me it was practised at Lady E. Ponsonby's, at 

 Bishops Courts, in Ireland. 



" Billing, Jan. 1794." 



u 3 



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