( 6 $ o ) 
Ilf. Tlx Method of making Tin-Plates, extratted 
from the Memoirs of the Academy of Sciences , 
for the Tear \ 725, by William Rutty, M. D. 
( 2 ^. 5 . Seer. 
T H E making of Tin-plates, or Lattin, as it is 
called, being not commonly praCtifed in Eng- 
land , though there is fo great a Confumption of it, 
either becaufe the Method is not fufficiently- known, 
or becaufe that in Ufe to make fmall Quantities for 
particular Purpofes is much too dear to anfvver the 
Artificer's Expectation in making larger, whereby 
we are obliged to export our own Tin to Germany , 
to receive it back again manufacture A 1 thought it 
not improper to lay before the Society the Method 
the Germans themlelves make ufe of, as I have ex- 
tracted it from a Differtation of Mr. T>e Reaumur prin- 
ted in the laft Volume of the Memoirs of the Aca- 
demy of Sciences of Taris, in which alfo he lays 
down fome Improvements, as he thinks, of his 
own. 
He takes notice then that the making of Tin-plates, 
(which is called in France , white Iron) does not pro- 
perly begin, till they go about to prepare the Leaves 
or Plates of Iron that are to be tinned, which are fup- 
pofed to be fufficiently thin and flat, and cut into 
Squares : But there are only certain Sorts of Iron 
which can be reduced into thefe Leaves, of which 
thofe are the moft proper, that when heated are eafi- 
eft extendible, and yet can be forged with a Hammer 
when cold ; the more fofc and extremely flexible, as 
w r ell 
