next greatest quantity of land in the same 

 e-uieutionecl district, not less than twenty- 

 live acres, statute measure, in the year 1804, 

 and shall at the proper season cause the same 

 to be plucked as above mentioned ; the silver 

 medal, or twenty-five guineas. Certificates of 

 the number of acres, of the distance of the 



• drills, of the plucking of the hemp, with a ge- 

 neral account of the soil, cultivation, and pro- 

 duce, to be delivered to the Society, along with 

 fourteen pounds of the hemp, and two quarts 



1 of the seed, on or before the second Tuesday in 

 January, 1805. 



PREMIUMS FOll DISCOVERIES AND 

 IMPROVEMENTS IN CHEMISTRY, 

 . Dl'IXO, AND MINERALOGY. 



87. Preserving Surds t>i Vegetables. 



For the best methods of preserving the seeds of 

 plants in a state fit for vegetation a longer 

 time i : stherto been practised, such 



method being superior to any known to the 

 public, and verified by sufficient trial, to be 

 communicated to the Society on or before the 

 first Tuesday in December, 1804; the gold 

 medal, or thirty guineas. 



88. Preventing the Dry-rot in* Tim- 

 ber. To t'»e person who shall discover to 



•the Society the cause of the dry-rot in timber, 

 and disclose a certain method of prevention 

 superior to any hitherto known ; the gold me- 

 'dal, or thirty guineas. The accounts of the 

 •cause, and method of prevention, confirmed 

 by repeated experiments, to be produced to 

 the Society on or before the second Tuesday 

 in December, 1804. 



89. PRESERVING SALTED PROVISIONS 

 FK07.I BECOMING RANCTD OR RVSTY. To 



the person who shall discover to the Society 

 tlie best, cheapest, and most efficacious method 

 of preserving salted provisions from growing 

 rancid or rusty ; the gold medal, or thirty 'gui- 

 neas. A full description of the method,' witli 

 proper certificates that it has been found, on 

 . repeated trials, to answer the purpose intended, 

 to be produced to the Society on or before the 

 'first Tuesday in February, 1805. 



90. Clearing Feathers from their 

 animal On,. To the person who shall dis- 

 cover to the Society the best and most expe- 

 ditious method, superior to any hitherto prac- 

 tised, of clearing goose-feathers from their 

 offensive animal oil, for the use of upholders, 

 in making beds, cushions, &c. the silver medal, 

 or twenty guineas. A quantity of such feathers 

 -unstripped and so cleared, not less than forty 

 pounds weight, with a full acco ant of the pro- 

 cess, to be produced to the Society on or before 



the first Tuesday in February, 1805. 



'Premiums in Chetnistn/, #te. 105 



tinous matter that incrusts the wicks of lamps 

 and extinguishes the light, though fully sup- 

 plied with oil ; the gold medal, or fifty guineas. 

 It is required, that the whole of the process 'be 

 fully and hiirly disclosed, in order that satis- 

 factory experiments may be made by the So- 

 ciety to determine the validity of the claim ; 

 and' certificates that not less than twenty gallons 

 have been purified according to the process de- 

 livered in, together with two gallons of the oil, 

 in its uupuriiied state, and two gallons -so re- 

 fined, be produced to the Society on or before 

 the second Tuesday in February, 1805. 



92. MANUFACTURING Tallow Candles. 

 To the person who shall discover to the Society 

 a method of hardening or otherwise preparing 

 tallow, so that candies may be made of it 

 Which will burn as clear and with as small a 

 wick as wax candles, without running, and may 

 be afforded at a less expense thfin any at pre- 

 sent made with spermaceti ; the gold medal, 

 or thirty guineas. Certificates that 1121b. of 

 such tallow have been made into candles, and 

 12lb. of the candles made thereof, to be pro- 

 duced to the Society on or before the second 

 Tuesday in January, 1805. 



93. Candi.es from Resin or other Sub- 

 stances. To the person who shall discover 

 to the Society the best method of making can- 

 dles of resin, or any other substance, fit for 

 common use, at a price much inferior to those 

 made of tallow only ; the gold medal, or thirty 

 guineas. Six pounds at least of the candles so 

 prepared, with an account of the process, to be 

 delivered to the Society on or before the first 



Tuesday in December, 1804. 



94. Method or sera rating Sugar in a. 

 solid Form from Treacle. To the person 

 who shall discover to the Society the best me- 

 thod of separating sugar from treacle, in a solid 

 form, at such an expense as will render it ad- 

 vantageous to the public ; the gold medal, or 

 fifty guineas. A quantity of the sugar so pre- 

 pared, in a solid form, not less than thh im- 

 pounds weight, with an account of the process, 

 and certificates that not less than one hundred 

 weight has been prepared, to be produced to 

 the Society on or before .the first Tuesday in 

 February, 1805. 



95. PROOF-SPIRIT. To the distiller 



in the year 1304, shall make the greatest 

 quantity, not less than one hundred gal 

 of a cleaii marketable spirit, from articles' not 

 the food of manor cattle, equal in itrengtli'ur 

 quality to the proof-spirit now in use, a 

 a rate' not higher than the spirit produced from 

 corn or melasses ; the gold medal,, or j 

 hundred guineas. Ten gallons of the S] 

 together with proper certificate;, and • 

 account of the expense and mode of mal. 

 to be produced to the Society on or befoi 



\ 91. Ri-itxtnt, Whmk on Si al Oil. For 



disclosing to the Society an effectual method first Tuesday in January, 1805. 



of purifying whale or seal oil from, the glu- 96. Increasing Sieam. To ' the ' persca 



