3 S * HISTORY OF THE [book. v. 
length, and from twenty to twenty-five inches in 
diameter 5 and the middle one, to which the mo¬ 
ving power is applied, turns the other two by means 
of cogs. Between these rollers, the canes (being 
previously cut short, and tied into bundles), are 
twice compressed ; for having passed through the 
first and second rollers, they are turned round the 
middle one by a circular piece of frame-work, or 
screen, called in Jamaica the Dumb-returner , and 
forced back through the second and third, an ope¬ 
ration which squeezes them completely dry, and 
sometimes even reduces them to powder. The 
cane-juice is received in a leaden bed, and thence 
conveyed into a vessel called the receiver. The 
refuse, or macerated rind of the cane, (which is 
called cane-trash , in contradistinction to field-trash, 
described in the preceding chapter), serves for fuel 
to boil the liquor.* 
V..- 
* Since the first, edition of this work was published, I have obtain¬ 
ed the elevation and plan of a sugar-mill (several of which have been 
erected within these few years in Jamaica) after a model originally de¬ 
signed by Edward Woollery, Esq. surveyor of the public works in that 
island ;—The relative proportions in the size of the different rollers or 
cylinders, vary from Mr. Woollery’s first design ; but the great im¬ 
provement, the addition to the middle roller of a lantern-wheel, with 
trundles or wallowers was purely his own. These act as so many fric¬ 
tion-wheels, and their utility and importance are best demonstrated by 
their effect. A cattle or mule-mill on the old model was thought to 
perform exceedingly well if it pressed sufficient canes in an hour to 
yield from 300 to 350 gallons of juice.—-The common return of a 
mill on Mr. Woollery’s construction is from 4 to 500 gallons. I 
have authority to say, that one of these mills in particular, which is 
worked with ten mules, produces hourly 500 gallons ; at this rate, 
