13803 j 
the goods from the oil after they are 
woven, lefs time and labour are required, 
than when oil only is made ufe of; and, 
that in no inftance is the effe&t of this 
gompofiition, when applied to the wool, 
different from oil, except on very’ greafy 
wool; and on this they do not recom- 
mend its ufe, uniefs fuch wool has been 
previoufly {cowered, 
aa 
MR. A. EEMEYTZRIEDER’S (Chelfea) for 
making PiANO-FORTES. 
After a full defcription of the various 
parts of the invention for which this pa- 
tent has been taken, it.is obferved in the 
{pecification, that the differences from 
the old conftruction are not merely-works 
ef chance; they are grounded on princi- 
ples either hitherto unknown or neglected. 
x. Betides the known proportions, there is 
a maximum, that is, a more advantageous 
point where the hammer ought to ftrike 
the ftring. “This maximum requires the 
action in the middle of the inftrument. 
2. Strings riding upon a fonorous plank, 
can give but a thin and ftiff tone; but 
ftrings riding upon a fonorous body mutt 
give a finer, full, and finging tone, which 
is the reafon that the new ftring-frame 
has all the folidity wanted to refit fuily, 
and by itfelf, all the drawing forces, in 
order that a light and founding back may 
form a fonorous body with a bridge-belly. 
3. The piano-forte mufic is harmony ; and 
harmony proceeds in its propagation from 
the treble to the bals, and ought to go 
direétly, and without reflexion, from the 
action of the player to the ears of the au- 
ditors. This is the reafon why thefe in- 
firuments have the ba‘s and {welling 
at theirback, 4. The piano-forte takes 
its name from its particular movement, 
which muft be fimpie, free, and elaftic, 
in order that the performer may. have 
udder his fingers the pianos, fortes, 
more pianos, more fortes, pianiffimos, 
fortiffimos. This is the reafon that all 
the parts of the inftrument aré indepen- 
dent. one of another; and the whole 
fo conftructed as to obey the player who 
has talte and {welling at the end of his 
fingers. 
— ee 
MR. JOHN NORTON’S (Roll*s Buildings) for ’ 
af IMPROVEMENT in the conjtruction of 
@ WATER-MILL. 
This improvement confifts in the appli- 
gation of a fcrew, either horizontally, 
yertically, or obkigquely, to the impulfe of 
New Patents lately Enrolled. 
849 
the water, and in fuch a way that the 
{crew may receive a motion from the 
water roundits own axis ; and being ap- 
plied to, and conneéted with, any of the 
well known machinery ufed in mill work, 
fhail produce and communicate to fuch 
faid machinery motion and effects as may 
_produce the general purpofes of a water- 
mill; The {crew is made of wood, iron, 
copper, or any other material, and will 
vary as to fize, place, &c. and either 
with fingle or double threads, and with 
one, two, or mere threads, and thefe 
deeper or lefs deep as circumi{tances may 
require. 
Obfervations by the Patentee—The 
great cbject of this invention is to acquire 
more power from the impulfe of the water 
than can be obtained by the common 
water-wheel, which does not receive the 
ftream on above one-third of its circum- 
ference ; and meeting with confiderable 
oppofition from the furface in going 
down, and having a confiderable weight 
of water to lift in rifiag, muf fubtrag 
confiderably from its power. But-the 
{crew moves freely with the ftream, whiéh 
it receives on its whole circumference at 
once, and meets with no oppofition to 
leflen its power, which muft therefore be 
at leaft three times that, of the, wheel. 
Again, the wheel takes the ftream near the 
furface; the {crew takes the bottom of 
the ftream, which is heavier and ftronger ; 
and, working under the veflel that car- 
ries the miil-work, is not liable to be 
damaged. The above is of courfe ap- 
plicable to any purpofe that_requires a 
moving power, : 
I FKP 
MR. T. FULCHEL’S (dpfwich) for a wa- 
TER-PROOF COMPOSITION, in imi- 
tation of PORTLAND STONE, for 
STUCCOING BUILDINGS, Ge. 
To three packs of the beft pit-fand, 
wathed perfeétly clean, dried, and cal- 
cined, add twelve pounds of white lead, 
well dried ; one peck and a half of dried 
whiting, and one pound of litharge of 
gold. Thefe are to be well mixed and 
beaten together with eight pints of lin- 
feed-oil, and two pints of the fpirits of 
turpentine, in a ftone or wooden trough, 
or mortar, till the whole becomes of the 
conliltency of putty. It is then fit for 
‘fiuccoing. When required for wafbing 
only, add to the above mixture twenty: 
pints of linfeed-oil and ten pints of {pirit 
of turpentine, and one pound of litharge 
of gold, the whole well mixed. The 
ns fluccoing 
- 
