420 A HISTORY OF 



s. d. To be adjudged 



mine of blacklead, and produce a 1766 



sample of at least 10 Ibs. . . . 40 o o Dec. 4th 



FIRE CLAY 



To the person who shall discover 

 within 20 miles of a seaport or navig- 

 able river, a fire clay such as the 

 Stourbridge clay, and fit for the use 

 of glass houses, producing a sample 

 of a ton weight, and giving security to 

 supply glass houses and all other 

 works with a sufficient quantity . . 50 o o ,, nth 



FULLER'S EARTH 



To the person who shall produce 

 the best Fuller's earth (not less than 

 5 cwt.) discovered in this kingdom .10 o o ,, i8th 



All matters for which the Society 

 offer premiums must be begun after 

 the publication of such premiums, un- 

 less there be a particular exception in 

 the publication. 



The Society reserve to themselves a 

 power of giving in all cases such part 

 only of any premium as the perform- 

 mance shall be adjudged to deserve, 

 or in case of want of merit, no part. 



A candidate for a premium or a 

 person applying for a bounty, being 

 detected in any disingenuous methods 

 to impose upon the Society, shall for- 

 feit all such premium or bounty, and 

 be incapable of obtaining any for the 

 future. 



The Society being desirous of avoid- 

 ing as much as possible the multipli- 

 cation of oaths in the disposal of their 

 premiums, request that the nobility, 

 magistrates, gentry and clergy in their 

 several districts will give their atten- 

 tion, when applied to for certificates 

 of the merit of any candidate for a 



