Hall marks on gold & silver plate

no HALL MARKS ON PLATE.
ounce troy remains the same, containing 480 grains, but is now
divided decimally into tenths, hundredths and thousandths, so that
the thousandth part of an ounce troy is exactly equal to .48 grain,
or nearly one-half. It will be seen from this that the exact equivalents
in the new bullion and old weights cannot be shown without
using decimals or complicated fractions, which being of no practical
utility, are omitted in the following table, and only the nearest
quarter-fraction inserted, the difference being always less than ^ of
a grain. For weighing precious stones, the karat is abolished, and
"decimal grain weights" (or the grain troy divided decimally) sub-
stituted; 3.17 grains being nearly equal to one karat, and the equivalents
being calculated to ^^ th of a karat, as now used.
The small sets of troy weights sanctioned by the Act of 1879
are sold in nests of ten, fitting into each other, the divisions being
marked thus :
01. OZ. OZ. or.
20 . 10 . 5 . 3 . 2 . I . -f^, equal
_2_
10 4 dwts. ^jy
to 10 dwts. _3_
10
= 2 dwts.
With loose square weights, marked thus :
6 dwts.
.05 = 24 grs. .04 = i9igrs. .03 = i4^grs. .02 = Qigrs. .oi = 4|grs.
.oo5 = 2|grs. .oo4 = 2grs. .oo3 = i|grs. .oo2 = igr. .001 =| a gr.
Table showing the corresponding value of the Old Troy
weights lately in common use, and the 'New Decimals legalised in
1879, omitting the fractional parts of grains and dwts.
New
Weights.
PENNYWEIGHTS.