The foul gas leaving the scrubbers contains, as a general average, 30 grains of sulphuretted hydrogen, 40 grains of carbon disulphide and zoo grains of carbon dioxide per Ioo cub. [Please select]
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Then the clerks and cashiers and floorwalkers and cash girls went home and the store was closed for the night, although the sweepers and scrubbers remained to clean the floors for the following day. [Please select]
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