. Transactions. ute. The plates of the screens have respectively 1-, , 2-, 3-in. round perforations, and separate the coal into slack,pea-, nu1>, stove-, egg- and broken-sizes. A 1UTI MI\ iAL BREAK B7 ? ~ u * it is s < a di Mp ^T ilH \. J! ° * I : O B Z /- U _r n ^ - :_ -o \ k z 0 JE ? • ^E3 T

Size: 1827px × 1368px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries