A rudimentary treatise [&c.]. |
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Page 217
... brattice into D and u , the downcast and upcast portions . The pillar between the levels is holed through by a " thirl " at A , when the drift - ends are advanced but little beyond that point . Sub- sequently , when в has been thirled ...
... brattice into D and u , the downcast and upcast portions . The pillar between the levels is holed through by a " thirl " at A , when the drift - ends are advanced but little beyond that point . Sub- sequently , when в has been thirled ...
Page 218
... brattice . A single current may thus be carried to the various working places , and brought back to the same or to * For temporary purposes a useful brattice - clth is largely manu- factured by Mr. Darcy Lever , of Bolton . another ...
... brattice . A single current may thus be carried to the various working places , and brought back to the same or to * For temporary purposes a useful brattice - clth is largely manu- factured by Mr. Darcy Lever , of Bolton . another ...
Page 223
... brattice , a door , or stopping , a manometer or water - gauge is employed . This , although it gives no criterion of the amount of ventilation , is very useful for comparisons , as giving a measure of the resistances , or of what is ...
... brattice , a door , or stopping , a manometer or water - gauge is employed . This , although it gives no criterion of the amount of ventilation , is very useful for comparisons , as giving a measure of the resistances , or of what is ...
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Common terms and phrases
accidents amount Architect beds Belgium bords bottom brattice cage carboniferous carried cloth boards coal-measures coalfield collieries commonly containing Crown 8vo cylinder dangerous Davy depth Derbyshire districts drifts drum Edition employed engine explosive fathoms feet of coal feet thick fire-damp Forest of Dean furnace gauze ground HENRY LAW inches diameter inclined increase iron Lancashire length levels lifted light lignite limestone load long-wall lower measures method miles millstone grit mineral mines mode Newcastle North numerous Illustrations opened passing person pillars pits Plates practical present pumps purpose quantity raised RALPH TATE revised roads rocks rods roof rope Rudimentary Treatise safety lamp scale SCOTT BURN seams Seaton Delaval shaft shales Shireoak side Sigillaria South Wales square miles Staffordshire steam stone strata stroke surface timber tion tons tubs upcast upper velocity ventilation waggons weight wheels whilst wire wood Woodcuts yards
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