1904.] 
owho shall discover, within Great-Britain or 
ireland, a quarry of white marble fit for the 
purposes of statuary, and equal in all respects 
to those kinds now imported from Italy ; the 
pie medal, or one hundred pounds, A 
block of at least three feet in length, two in 
height, and two in width, with an account of 
the situation of the quarry, and certificates. of 
its possessing considerable extent, to be pro- 
duced to the Society on or before the first Tues- 
day in February, 1805. 
iN, B; Ia order to prevent useless expense 
or trouble to theclaimant in forwarding so large 
a block, ‘the Society will be ready to examine 
any smaller specimen of the marble, and ex- 
press their opinion of its value to the candi- 
@ute betore the block required by the above 
premium is produced. 
107. Preparation of Sunpuuric Acip 
rrom Sunepuur witnour THE Usb OF any 
Nrerre Satz’ Yo the person who shall pre- 
pare the largest quantity (not less than one 
ton) of sulphuric acid trom sulphur, without 
any nitric salt, of a specific gravity, not in- 
ferior to the best sulphuric acid of commerce ; 
the gold medal, or fifty guineas. Certificates 
that not less than the above 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, 1805. 
108, Preparation OF 4NY ALKALINE 
or earntuy Nirrars. To the person who 
shall prepare, ig Great-Britain, the largest 
quantity, not less than one hundred weight, of 
any salt of nitric acid, with either earths or 
alkalies, by a method superior to and as cheap 
as those hitherto practised ; the gold medal, or 
one hundred guineas. Certificates of the above 
quantity having been prepared, and a sample 
of not less than 281b. to be produced to the So- 
eiety on or before the last Tuesday im January, 
1805, 
109. Fine Bar-Inon. To the person, in 
Great-Britain, who shall make the greatest 
quantity of bar-ivon,’ not less than ten tons, 
with coak, from coak-pigs, equal. in quality 
to the best iron imported trom Sweden or Rus- 
‘sia, and as fit for converting info steel ; the 
-gold medal, or fifty guineas, Samples,not less 
than one hundred woight, with certificates 
that the whole qnantity is of equal quality, to 
be produced to the Society on or before the 
first Fuesday in January, 1805. 
110. Prrservinc Inonrrom Rust. 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 preparing the compositian, with certificates 
that it has stood at least twa years unimpaired, 
being exposed to the atmosphere during the 
whole time, to be preduced to the Society, 
Premiums in Chemistry, &c. 
579 
with ten pounds weight of the composition, 
gn-or before the first Tuesday in January, 1805. 
4111. Rerinitnc Biocx-Tiy. To the pet- 
son who shall discover to the Society the best 
method of purifying or refining block-tin, so 
as to render it fit for the fimest purposes to 
whicl graiustin is now applied, and not higher 
in price; the gold medal, or fifty guineas. 
Certijicates that not less than three tons have 
been so refined or purified, with a full detail of 
the process, anda quantity, not less than one 
hundred weight, of the tin so refined, to be 
produced to the Sdciety on or before the first 
Tuesday in January, 1805. fs 
142. Grazinc Earrnen-Ware witu- 
ovr Leap. To the person who shall discover 
to the Society the cheapest, safest, most dura- 
ble, and most easily tusible, composition, fit 
for the purpose of glazing the ordinary kinds 
of earthen-ware, without any preparation of 
lead, and syperior to any hitherto in use ; the 
gold medal, or thirty guineas. Specimens of 
the ware so glazed, with proper certificates of 
its having succeeded, and asample of the ma- 
terials made use of, to be produced to the So- 
ciety on or before the first Tuesday in Feb, 1805, 
113. Rerrninc Copprr From THE Orr. 
To the person who shall discoyer to the So- 
ciety the best method of separating, purifying, 
and refining copper from the ore, so as to ren- 
der it fit for the finest purposes to which fine 
copper is now applied, and by a process. su- 
pévior to any hitherto known or in use, and not 
higher in price ; the gold medal, or filty, gui- 
neas. Certificates that not less than three tons 
have been so prepared or refined, and a quan- 
tity not less than one hundred-weight of the 
copper so refined, to be produced to the So- 
ciety on or before the first Tuesday in Feb. 1805. 
114. Mineratocicat Map or Excianp 
anp Watrs. To the person who shall com- 
plete and publish an accurate mincralogical 
map of England and Wales, ona scale of not 
less than ten miles to an inch, contaming an 
account. of the situation of the different 
mines therein, and describing the kinds of mi- 
nerals thence produced ; the gold medal, or 
fifty guineas. Certificates of the accuracy of 
such map, together with the map, to be pro- 
duced to the Scciety on or before the first Tues- 
day in February, 1805. The map to remain 
the property of the Society. , 
115. Minrratocicar Mar orIreianp. 
The same premiym is offered for a mineralogi- 
cal map of Ireland, on similar conditions, 
116. Mineranoercan MaporScorranp. 
The same premium is offered for a mineralogical” 
map of Scatland,, on:similar condiiiwns. 
117. Narvrat History. To the author 
who shall publish, in the year 1804), the natu- 
ral history of any county in England or 
Wales ; the gold medal, or fifty guineas. It 
is required that the several natural productions, 
