256 
SLATE LABOTTB. 
Hon chrificadoras, accelerated the evapora. 
movenhl^ ? cuvercles and 
moveable trames, fiirnishod with counter-weights, might ex- 
ti o^^Jectmeritsfurther examina- 
tion , but the quantity of vezou (guarnpo), of the crvstaUized 
sugar extracted, and that which is destroyed, the fuel the 
time, and the pecuniary expense, must be carefuUy estimated. 
An error, very general through Europe, and one which 
influences opinion respecting the effects of the abolition of 
the slave-trade is, that m those West India islands called 
mgwr oolomes,ihe majority of the slaves are supposed to be 
tTi'sTal. f The cXvation of 
2tiv tf a PO"-erful incentive to the 
acHvity of the slave trade; but a very simple calculation 
the West" f r ® contained in 
the West Indies is nearly three times greater than the 
number employed in the production of sugar. I showed 
froTt^rri the 200,000 cases of sugar exported 
froin the island of Cuba, in 1812, were produced in the great 
establishments, less than 30,000 slaves would have suffiiied 
for that kind oi labour. It ought to be borne in mind for 
the interests of humanity, that the evils of slavery weio-h on 
a much greater number of individuals than agricidtiiral 
dlinrfrr''®’ I Vdl far from 
doing, that su^ar, coffee, indigo, and cotton, can bo culti- 
vated oidy by slaves At the island of Cuba it is generally 
supposed that one hundred and fifty negroes are requWd 
or Tro^d ° 
or, in roiuid numbers, a little more than 1200 kilog. by 
le labour of each adult slave. The production of 440 000 
cases would consequently require only 66,000 slaves ’ If 
we add 30,000 to that number, for the cultivation of coffi 
^ ^t.0,000 sliHms now there, would suffice for 
the three great branches of colonial industry on which the 
activity of couiinerco depends, 
COEFEE.— The cultivation of coffee takes its date, like 
the improved construction of cauldrons in the sugar houses, 
from the arrival of the emigrants of San Domingo^ especially 
after the years 1796 and 1798. A hectare yields 860 kilog'. 
