gjro- Bniifh Mineralog'tcal Sociel/^ 



for J and the number of fpecimens fent to the Society io 

 analyfis, evince at the fame time the utility of the fcheme 

 and the public confidence. 



" The Society confills of a competent number of members 

 in the habitual praftice of chemical operations, each of whom 

 undertakes an analyfis in rotation, (afliiled, in cafes of pecu- 

 liar intricacy, by a felcft committee,) the refult of which, 

 after general approbation, is tranfmitted by the fecretary to 

 the perfon who fent the fpecimen. Since, however, feverai 

 of our correfpondents, from inadvertence, have not complied 

 with the conditions mentioned in the circular letter of the 

 Society, we here repeat themy with the addition of fome 

 ©tilers, and beg to have it underftood that no analyfis w ill be 

 undertaken where thefe are not complied with : 



" I, The whole of each fpecimen muft be at leaft four • 

 pounds weight, and in as few pieces as poffible. The perfoa '. 

 who feuds the fpecimens, if more than one, fliould break a 

 fmall piece from each, taking care to referve and mark them 

 with the fame numbers as thofe that he fends to the Society- ; < 

 becaufe, in the analyfis returned to him, the different fpeci- 

 mens will be difHnguiflied by their numbers : the fafefl: wayh 

 of marking each will be to write the number on a flip of 

 paper, and fix it on the fpecimen with gum-water. Kvery 

 piece muft be wrapped- in paper, and packed in a box with 

 faw-duft, addreffed (carriage paid) to Mr. W. H. Pfepys, 

 Poultry, London. * 



" a. A paper muft accompany the fpecimens, ftating their 

 provincial names j the name of the parifti and county where 

 they are found ; the depth of the mine or quarry where they 

 are procured ; the general extent and bearing of the vein or 

 ftratum towards the points of the compafs; and the method of 

 procuring them, whether by blafting or by the pick-axe, &c. • 



'' 3. The Society alfo requefts, that the metallic ores which'' 

 may be fent them for analyfis may be accompanied with fpe- 

 cimens of the gangue or matrix in which they are found, and 

 of the fuperincumbent ftrata, with their rcfpcftive depths and 

 prftvincial appellations, according to the foHowing form * : 



' The b'anks, and parts pvinteii in Italic!, to be occupied by thtir 

 proper d«fcription.' , 



« SpecimeQi 



