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Show CONTRIBUTIONS TO THE PUBLIC PUB-LIC MUSEUM. I Edilors Ucrahl: I have received lrom Henry fc'cw&il, Esq., of this city, a silver medal and a specimen ot the Gibraltar Bock, which he has given to me for our future fu-ture Public Museum. The medal was struck from pure silver in commemoration com-memoration of the labors ol the Freibere School of Mines, by order of the then Elector of Saxony, Frederick Augustus, in 170-3. On the reverse is a mimic representation of the mining and Bmelting processes of that day; more curious still is a simple mode of concentration by the wet method. " The operator holds a two-handled sieve in which he receives the pulverized pulver-ized ore from a trough inclined at a suitable angle. The lurnacs is made of bricks, with a smoke stark that would certainly render the owner indictable in-dictable for a nuisance in thec days. The shaft of the adjacent mine is covered with a windlass of trio simplest simp-lest construction; a rope being attached at-tached to a post and an attendant is in readiness to brirg the oro to tho Buriace. xnere is mucu uu a but-gestivo but-gestivo and curious to any one interested inter-ested in metallurgical and mining operations. Tho present is an appropriate one to our, as yet, embryonic Public Museum, Mu-seum, coming from a gentleman who has written so much rebectiiift concentration con-centration and kindred subjects in our local papers since 1S71. Mnerum, Aug. 20, 1-571. |