80 
To the person who shall discover to the So- 
ciety a cheap, easy, and effectual method, 
verified by repeated and satisfactory trials, 
ef preventing the destructive effects occa- 
sioned by moths and other insects, in furs, 
woollens, and other articles, superior to 
any hitherto known cr practised 5 the silver 
medal, or fifteen guineas. ; 
Fhe accounts, with proper certificates, to 
be produced to the Society on or before tie 
frst Tnesday in January, 1810. 
74. Svratuary Marate. . To the person 
who shall discover, within Great Britain or 
Freland, a quarry of white marble fit for the 
purposes of statuary, and equal in all re- 
spects to those kinds now imported from 
Italy; the gold medal, or one hundred 
ounds. : : 
A block of at least three feet in lensti, 
two in height, and two in width, with an 
account of the situation of the quarry, and 
certificates of its possessing considerable ex- 
tent, to be produced: to the Society en or 
before the first Tuesday in February, 1810. 
N.B. In’ order to prevent useless ex- 
pense or trouble to the claimant in ‘for- 
warding so large a block, the Sectety will 
be ready to examine any smaller specimen 
of the marble, and express their opinion of 
ats value to the candidate before the block 
required by the above premium is pro- 
duced. 
75. PREPAPATION OF SuLpHuRIC Acin, 
FROM SULPHUR WITHOUT THE USE CF ANY 
Nireic Sart. To the person who shall pre- 
pare the largest quantity (not less than one 
- ton) of sulphuric acid from sulphyr without 
any nitric salt, of a specific gravity not in- 
ferior to the best sulphuric acid of com- 
merce; the gold medal, or fifty guineas. 
‘Certificates that not less than the abeve 
quantity of such an acid has been prepared, 
together with a sample, to be produced to 
the Society on or before the first Tuesday 
in January, 1810. 
76. PREPARATION OF ANY AEKALINE| 
on Eartuen Nitrare. To the person who 
shall prepare, in Great Britain, the largest 
quantit~, not less than one hundred weight, 
of any salt of nitric acid, with either earths 
or alkalis, by a method superior te, and as 
cheap as tliose hitherto practised; the gold 
medal, or one hundred guineas. 
Certificates of the above quantity having 
been prepared, and a sample of not less than 
98lb..to be produced to the Society on or 
before the last Tuesday in January, 1810. 
Great Britain, who shall make the greatest 
quantity of bar-iron, not less than ten tons, 
with ceak, from coak pigs, equal in quality 
to the best iron imported from Sweden cr 
Russia, and as fit for-beiag converted into 
steel; the gold medal, or fifty guineas. 
Samples, not less than one hundred weight, 
with certificates that the whole quantity is of 
equal quality, to be produced tothe Society 
~ 8. Preservine Tron From Rest. 
117. Fore Bar Ivon. To the person, in 
Proceedings of Learned Societies. 
on or before the first Tuesday in January, 
1810. : 
| To, 
the person who shall invent and discover to’ 
the Society a cheap composition, superior 
to any now in use, which shall effectually 
preserve wrought iron from rust; the gold 
medal, or fifty guineas. | 
A full description of the method of pre- 
paring the composition, with certificates 
that it has stood at least two years unime 
paired, being exposed to the atmosphere 
during the whole time, to be ‘produced to 
the Society, with ten pounds weight of the 
composition, on or before the first Tuesday 
in January, 1810. a : 
79. Reemine Brock Tin, 
best method of purifying or refining block- 
_ tin, so as to render it fit for the finest pur- 
poses to which grain-tin is now applied, 
é 
, To the per- — 
son who shall discover to the Society the 
and not higher in price; the gold medal; or 
fifty. guineas. 
Certificates that not less than three tons 
have been so refined or purified, with a full 
detail of the process, aud a quantity, not 
less than one hundred weight, of the tin so 
refined, to be produced to the Society on or 
before the first Tuesday in January, 1810. 
80. GLAZING EARTHEN- WARE wWITHe 
our Leap. To the person who shall discover 
to the Society the cheapest, safest, most: 
durable, and most easily fusible composition, | 
fit for the purpose of glazing the ordinary 
kinds of earthen-ware, without any prepa- 
ration of lead, and superior to any hitherto - 
in use; the gold medal, or thirty suineas. 
Specimens of the ware so glazed, with 
proper certificates of its having succeeded, 
and a sampie of the materials made use of, - 
to be produced to the Society on or before 
the first Tuesday in February, 1810. — 
81. Reriminc Copper From THE Ore, 
To the person who shall discover to the So-_ 
ciety the best method of separating, purify- 
ing, and refining copper from the ore, so az 
to render it fit for the finest purposes to 
which fine copper is now applied, and by a 
process superior to any hitherto known or 
in use, and not higher in price; the. gold . 
medal, or fifty guineas. E 
re 
) 
Certificates that not Jess than three tons ‘ 
- have been so prepared or refined, and a 
quantity not less than one hundred weight _ 
of the copper so refined, te be produced ta 
in February, 1810. 
82. MINERALOGICAL Map er ENGLAND. 
AND WaLEs. To the person who shall com- 
plete and publish an accurate mineralogical _ 
map of England and Wales, on a scale of - 
not less than ten miles to an inch, contains 
ing an account of the situation of the dif- 
ferent mines therein, and describing the — 
the 
kinds of minerals thence produced ; 
gold medal, or fifty guineas. 
Certificates of the accuracy of such map, 
> 
. 
the Society on or before the first Tuesday . 
7s 
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