500 Ox ihe Procefs of Bleaching with 
. ‘tion can take place, except where the rim does not apply 
clofely to the fides of the box ; which will, however, form a 
very trifling furface if the carpenter’s work be decently done. 
The cloth is now to be wound from the axis L upon the 
axis K, by turning this; and when this is aceomplifhed, 
the handle Pand pulley Q are to be changed, and the cloth 
is to be wound back upon the ‘axis L. This operation is, 
of courfe, to be repeated as often as neceffary. It is plain, 
that by this procefs of winding the cloth from one axis upon 
the other, every part of it is expofed, in the moft complete 
manner, to the action of the liquor in which it 1s immerfed. 
Et will be neceflary to turn, at firft, very brifkly, not only be- 
caufe the liquor is then the ftrongeft, but alfo becaufe it re- 
quires a number of revolutions, when the axis is bare, to 
move a certain length of cloth in a given time, though this 
may be performed by a fingle revolution when the axis is 
filled. Experience muft teach how long the goods are to be 
worked; nor can any rule be given refpecting the quantity 
and ftrength of the liquor, in order to bleach a certain num- 
ber of picces. An intelligent workman will foon attain a 
fufficient knowledge of thefe points. It is hardly neceffary 
to obferve, that, if the liquor fhould retain any ftrength after 
a fet of pieces are bleached with it, it may again be employed 
for another fet. 
With a few alterations, this apparatus might be made ap- 
plicable to the bleaching of yarn. If, for inftance, the pulley 
© were removed from the end of the axis K, and fixed im- 
micdiately under the tube H;—if it were perforated in all 
dire&tions, and tapes or ftrings pafied through the holes, 
fkains of yarn might be tied to thefe tapes underneath the 
pulley, fo as to hang down towards the bottom of the box. 
The apparatus bemg afterwards filled with bleaching hquor, 
and the axis turned, the motion would caufe every thread to 
be acted upon by the liquor. Several axes might thus be 
turned in the fame box, and being conneéted with each other 
by pulleys, they might all be worked by one perfon at the 
fame 
