1798.] 
previous procefe of wafhing the hides, 
SEGUIN deviates from the general prac- 
tice: with him, they are not, as elle- 
where, thrown in a contuled heap into 
the water, but hang feparate from each 
other, and extended perpendicularly, in 
order that both fides may equally imbibe 
the moifture. To take off the hair, the 
hide is hung in a vat full of lime- water; 
and, as the lime naturally fubfides to the 
bottom of the veflel, the water is fre- 
quently ftirred, that it may cenftantly 
remain tmpregnated with the particles of 
hime, and that its attion may be duly 
exerted on the hide. ‘Fhis operation re- 
quires eight days. SriGuin has difco- 
vered that, when 2 fmall quantity of {ul- 
phuric acid is mixed in the water which 
has already been employed in this pro- 
eefs, it renews and even increa.es its 
activity. 
The procefs of {welling the leather is 
completed in twenty-four hours. The 
hides, cleaned from all adhering portions 
of fiefh, are funk in vats filled with 
water which is impregnated witha fif- 
teen-hundredth, or from that to a tlrou- 
fandth part, of fulphuric acid. 
In tanning the leather, SEGuiN has re- 
jected the common methed cf laying the 
hides in pits. He firft plunges them in 
water impregnated with tan; and, after 
having repeated this immerfion, he adds a 
new liquor, whofe itrength is between the 
eleventh and twelfth degrecs of the 22ro- 
meter, fuch as is employed for the lique- 
faction of falts. The operation of this 
fan is very expeditious. ‘The hides are 
at firit foaked in a weak folution of tan, 
which only operates on their outer fur- 
face, and afterwards by degrees in a 
fironger tan. By this proceis the foal- 
leather is tanned in from fourteen to fix- 
teen days; and SeGuin has often com- 
pleted his operation in fix or eight. .The 
hides are then dried in the ufual manner. 
As the vamp-leather is not fubi-Ged to 
the procefs of {welling, it is tanned in 
three or four days. 
It was long believed that the effect of 
the tan was only to aftringe and confoli- 
date the fibres of the hide, which had 
been relaxed by the preceding operations: 
but SeGuin has difcovered that the tan 
contains a peculiar element, which {pon- 
taneoufly diffolves in the water, but which 
afterwards penetrates into the pores of 
the leather, there acquires confiftency. 
and becomes thenceforward indiffoluble 
even to water itfelf. He remarked the 
effect of this amalgamation in glue, which, 
being firft precipitated by that clement, 
Lanning....Dobtrines of the Quakers. 
243 
becomes indiffoluble in hot water. After 
{uch amaigamation, the leather ceales to 
be diffoluble. 
The refult of thefe obfervations affords 
reom to hope that a diminution may take 
place in the confumption of oak-bark, 
and that many other vegetable fubftances 
may be found, of which infufions may be 
ufed in tanning. ‘Bheir aptnefs for the 
purpole may be difcovered, if infufions of 
them poilefs the fame property of pre- 
eipitating glue. 
oe 
To the Editor of the Mouihly Magazine. 
SIR, x 
Ae anv of your medical correfpondents 
will (through the medium of your very 
entertaining Magazine) favour the writer 
with their opinion of the effect of Rofe- 
mary (ufed as tea) en the human cont{ti- 
tution, they will confer .an obligation om 
your conftant reader and great admirer, 
Aldermanbury, W.H. 
Oct. 18, 1798. 
ae 
To the Editor of the Monthly Magazine. 
SIR, 
N. has, im your laft Magazine, again 
e brought forward the ‘* Summary 
View of the Doétrizes,* &c. publifhed by 
the fociety of Friends ; and maintains that 
in ir they acknowledge and affert the 
divinity of Jefus Chrift, hecaufe they fay, 
in fcriptural language, that * Chrift is’ 
the power of God unto falvation.” This 
paffage, corrected as it is in the “ Sum- 
mery View,” mutt feem inferted with 
an intent to explain, or define, their ides 
of Chrilt’s divinity: and if the explana- 
tion were univerfally adopted by the fo- 
ciety, I fhould, without hefitation, con- 
clude as fermerly (No. xxxi. p. 3285} 
“¢ that the Quakers. do/not, like ortho- 
dox believers, confider the word of God, 
the Son, the Mefliah, the Mediator, as 
a perfon, but merely as an attribute of 
the Deity, viz. his power exerted in » 
particular direétion, or to. a particular 
end.”” 
It would, om the fame view, be des 
ducible, that the fociety of Friends’ 
agreed with the Socinians in thew lead- 
ing tenet: (I did hot fay tenets, as ° 
I. N.’s poiticript feems to infinuate} and 
muft ramk with other Unitdrians, or 
Deiits of revelation. : 
It appears, nowever, from the obfer- 
vations of W.F. and of Eutheates, 
(Monthly Magazine for July and Au- 
guft) that the Friends, individually, do 
not adopt any fuch principle from the 
“ Summary View,’ nor trom any efta- 
blithed 
