A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . a trunk ... 29i 61H lOi 1 Aggregate number of hours occupied bv the lads in doing the work, viz., feed- ing cuttings and hutching smiddum IIU 195f 84i Aggregate number of hours occupied by the lads in wasliing sludge and smid- dum, including the final cleaning in a trunk 102 123 21 Cost :— £ s. d. £ s. d. £ s. d. Of boys attending mftchinc, wheeling away waste, and preparing ore for the bing-stead 1 1 15 9 2 8 9i 0 13 Oi 852 ORES, DRESSING OF. Produce:—
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . a trunk ... 29i 61H lOi 1 Aggregate number of hours occupied bv the lads in doing the work, viz., feed- ing cuttings and hutching smiddum IIU 195f 84i Aggregate number of hours occupied by the lads in wasliing sludge and smid- dum, including the final cleaning in a trunk 102 123 21 Cost :— £ s. d. £ s. d. £ s. d. Of boys attending mftchinc, wheeling away waste, and preparing ore for the bing-stead 1 1 15 9 2 8 9i 0 13 Oi 852 ORES, DRESSING OF. Produce:— Borlases machine Hiitchers Difference in totalproduce in favorof Borlases ma-chine Ditto ditto - Sieve and Smlddum Ore. Sludge Ore. Total Ore. Total Lead. St. lbs. Assay. Lead. St. lbs. Assay. Lead St. lbs. St. lbs. 19 1017 6i p. 32 5f13 p. 64 52 If30 6i 21 9i71 p. cent. 34 7118 Hi 15 1084 p. cent. Petlicrick^s Separator. Figs. 489 and 490. a, the plunger or force-pump; b, recep-tacles fitted with sieves; c, hutch filled with water; d, discharge holes fitted with wooden 489. 4 00
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
