l6 
Mr. Henry on the Confijlency of 
hiftorian and the poet, are indebted to her for 
their diffufion and permanency. 
To fhew the advantages arifing from this 
fcience in all the arts through which they might 
be traced, would carry me far beyond the limits 
of my prefent defign. It may be fufficient to 
point out the connexion which fubfifts between 
Chemiftry, and thofe manufactures which are 
the pride and glory of this refpeCtable commer¬ 
cial town. 
Bleaching is a chemical operation. The end 
of it is to abftraCt the oily and phlogiftic parts 
from the yarn or cloth, whereby it is rendered 
more fit for acquiring a greater degree of white- 
nefs, and abforbingthe particles of any colouring 
materials to which it may be expofed. 
The materials for this procefs are alfo the 
creatures of Chemiftry, and fome degree of che¬ 
mical knowledge is requifite to enable the oper¬ 
ator to judge of their goodnefs. Quick-lime 
is prepared by a chemical procefs. Pot-afh is 
a produCt of the fame art; to which alfo vitriolic, 
and all the acids owe their exiftence. The 
manufacture of foap is alfo a branch of this 
fcience. All the operations of the whitfter ; 
the fteeping, wafhing and boiling in alkaline 
iixiviums ; expofing to the fun’s light, fcouring, 
rubbing and blueing are chemical operations, or 
founded on chemical principles. The fame may 
be 
