\vho shall discover. 



Ireland, a quarry of white marble fit for the 

 purposes of statuary, and equal in all respects 

 jo those kinds now imported from Italy ; the 

 gold medal, or one hundred pounds. A 

 rode of at least three, feet in length, two in 

 height, and two in width, with an account of 

 the situation of the quarry, and certijicates of 

 iis possessing considerable extort, to be pror 

 duced to the Society on or before the first Tues- 

 day in February, 180.5, 



A 7 . B. In order to prevent useless expense 

 or trouble to the claimant 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- 

 date before the block required by the above 

 premium is produced. 



107. PREPARATION Or SULPHURIC" ACID 

 ) 'ROM SULPHUR WITHOUT THE USE OF ANY 



Kit me Salt,. To the person who shall pre- 

 pare the largest quantity (not less than one 

 ton) of sulphuric acid from sulphur, without 

 Hay 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 any alkaline 

 or earthy Nitrate. To the person who 

 shall prepare, in 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 28lb. to be produced to the So r 

 cietyon or before the last Tuesday in January, 

 1805. 



109. Fine Bar-Iron. To the person, in 

 Great-Britain, who shall make the greatest 

 quantity of bar-iron, not less than ten tons, 

 with coak, from coak-pigs, equal in quality 

 to the best iron imported from Sweden or Rus- 

 sia, and as lit for converting into steel ; the 

 gold medal, or fifty guineas. Samples, not less 

 than one hundred weight, witb certificates 

 that the whole quantity is of equal quality, to 

 be produced to the Society on or before the 

 first Tuesday in January, 1805. 



HO. Preserving Iron from Rust, To 

 the perspn 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 

 titty guineas. A full description of the method 



Premiums in Chemistry, fyc. 107 



within Great-Britain or with ten pounds weight of the composition, 

 on or before the first Tuesday in January, 1805, 

 111. Rffining Block-Tin. Tothe per- 

 son who shall discover to the Society the best 

 method of purifying or refining block-tin, sq 

 as to render it fit for the finest purposes to 

 which grain-tin is now applied, 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, and a quantity, not less than one 

 hundred weight, of the tin so refined, to be 

 produced to the Society on or before thp first 

 Tuesday in January, 1305. 



112. Glazing Eartiifn-Ware with- 

 out Lead. To the person who shall discover 

 to the Society the cheapest, safest, most dura- 

 ble, and most easily fusible, composition, fit 

 for the purpose of glaring the ordinary kinds 

 of earthen-ware, without: any preparation of 

 lead, and superior to any hitherto in use ; the 

 gold medal, or thirty guineas. Specimens of 

 the ware so glazed, with proper certijicates of 

 its having succeeded, and a sample of the ma- 

 terials made use of, to be produced to the So- 

 ciety on or beforethe first Tuesday in Feb. 1805. 



113. Refining Copper from the Ore. 

 To the person who shall discover 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- 

 perior, to any hitherto known or in use, and not 

 higher in price ; the gold medal, or fifty 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' v 

 copper so refined, to be produced to the So- 

 ciety on or before the first Tuesday in Feb. 1 805. 



114. Mineralogical Map of 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, containing 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. Certijicates of the accuracy of 

 such map, together with the map, to be pro r 

 duped to the Society on or beforp the first Tues- 

 day in February, 1805. The map to remain 

 the property of the Society. 



115. Mineralogical Map of Ireland. 

 The same premium is offered for a mineralogi- 

 cal map of Ireland, on similar conditions. 



116. Mineralogic. 



of preparing the composition, with certificates 

 that it has stood at least two years unimpaired, 

 being exposed to the atmosphere during the 

 jylmle time, to be produced to the Society, 



l Map orScoTLAND. 

 The same premium is offered for a mineralogical 

 map of Scotland, on similar conditions. 



117. Natural History. To the authojr 

 who shall publish, in the year 1804, the natu? 

 ral history of any county in England or 

 Wales ; the gold medal, or fifty guineas. 1% 

 k required that the several natural production^ 



