84 
royal navy, and ata marketable price 5 the 
gold medal. 
Certificates of its being racine ett ed by 
- the person sending it, anda particular De- 
- tail of the several circumstances attending _ 
its manufacture through the different stages 
thereof, to be sentto the Society on or he. 
fore the last Tuesday in March, 1810. 
For the next best in merit on similar con- 
ditions, the silver medal. 
teal 
PREMIUMS IN MECHANICS. 
131. GunpowpeR-Mitis. To the person 
who, in the year 1809, shall invent and bring 
to perfection the most effectual method of 
' 80 conducting the works of gunpowder-mills, 
in the business of making gunpowder, as to 
prevent.explosion 5 the gold medal, or one 
hundred guineas. 
' Certificates and accounts of the method 
having been put in practice in one or more 
gunpowder-mills in this kingdom, and that it 
promises, in the opinion of the best judges 
concerned in such works, to answer the pur- 
pose intended, tobe produced to the Society 
on or before the first Tuesday in February, 
1810. 
_N.R. As an encouragement to persons to 
turn their thoughts to improvements of this 
nature, if any‘should be made on the pre- 
sent method of conducting the business of 
gunpowder making, which fall short of the 
total prevention of explosion, and they are 
sent to the Society for the sake of humanity, 
the papers so sent in willreceive due con- 
sideration, and such bopnty or reward will 
be bestowed as they may appear to merit. 
132. TranstrInstRomMENT. To the per- 
son who shall invent and produce to the 
Society a cheap and portable transit-instru- 
ment which may easily be converted into a 
zenith-sector, capable of being accurately 
and expeditiously adjusted for the purpose 
of finding the latitudes and longitudes of 
places, and superior to any portable transit- 
instrument now in use; the gold medal, or 
forty guineas. 
To be produced on or bene the last 
Tuesday in January, 1810. 
133. Taxinc WHALES BY THE GuN- 
Harpoon. Tothe person who, in the year 
1809, shall strike the greatest number of 
whales, not fewer than three, with the gun- 
harpoon ; ten guineas. 
Certificates of the striking such whales, | 
and that they wereactually taken in the year 
1809, signed by the master, or by the mate, 
when the claim is made by the master, to 
be produced to the Society on or before the » 
last Tuesday in December, 1809. 
134. Famity-Mixtzt, ‘To the person who 
shall invent and produce to the Society the 
best-constructed mill for grinding corn for 
the use of private families, or parish-poor3 
the construction to be such as to render the 
working of the mill easy and expeditious, 
Proceedings of Learned Societies. 
and superior to any hithertoin use; the gold 
medal, or thirty guineas. 
The mill, and certificates of its having 
been used to good effect, to be produced 
to the Society on or before the first Tuesday 
in February, 1810. Cheapness and simpli- 
city will be considered as essential parts of — 
its merit ; and the mill or a model, toremain 
with the Society. 
135. MacHINE FOR RAISING Coats, 
Ore, &c. &c-, To the, person who shall in- 
venta machine for raising coals, ore, &c. 
from mines, superior to any hitherto known 
or in use; and which shall produce the 
effect ata less expense than those already 
known, or in use; the gold medal, or fifty 
guineas. 
A model of the machine, made ona scale 
of not less than one inch to a foot, witha 
certificate that a machine at large on the 
same construction has been advantageously 
used, to be produced to the Society on or 
before the second Tuesday in February, 
1810. 
136. ImproveD WALKING- WHEEL, OR 
Crane. To the person who shall invert an 
improved walking-wheel or crane,on which | 
the weight and power of any person or per- 
sons shall be applied with the greatest safety 
and effect, andso contrived that the power 
can be varied according to the greater or 
less weight to. be raised or lowered; the 
gold medal, or thirty pt a 
The model, ona scale of not lessthan one 
inch toa foot, with a proper certificate that 
the machine at large has been employed to 
good effect, to be produced to the Society 
on or before the second Tuesday in Fe- 
bruary, 1810. 
137. MaAcuIne FoR RAISING WATER.: 
To the person who shall invent a machine on ° 
a better, cheaper, and more simple. con- 
struction than any hitherto known or in use 
for raising water out. of\ wells, &c. froma - 
depth of not less than fifty feet; the gold 
medal, or thirty guineas. 
* Certificates of the performance of the ma- 
chine, and amodel of it, on ascale of not 
‘ess than one inch to a foot, to be produced 
to the Society on or before the first Tuesday 
in February, 1810. 
138. Exm Press. To the person who shall 
invent and discover to the Society a substi- 
tute for the elm pipes now in common usé 
for the conveyance of water, which shall be 
cheaper, equally effectual, and, more dura- . 
ble than any heretofore employed ; the gold © 
medal, or thirty guineas. | 
It is required that one of the pipes ‘so — 
employed, an accurate account of the method 
used, and every expense attending it, toge- 
ther with satisfactery accounts of its being 
effectual, be delivered to. the Society on 
or before the second. Tuesday i in January, 
1510. 
139. Lavine Woopen a ‘To the 
person whoshall invent and discover to the ~ 
_ Societya superior method of laying or eqn; 
