| | | | | | +------------------------------+-------------+--------+--------------+ +-----------------------------+-----+--------------------------------+ | | | | | | | | | | | | | | Per-| | | |cent-| | | | age | | | | of | | | | Lead| | | | in | | | Occupation. |Dust.| Remarks. | +-----------------------------+-----+--------------------------------+ | (1) | (6) | (7) | |Tinner using open bath | -- |The whole inhaled in the form of| | | |vapour of lead or similar | | | |compound. | |Tinner using bath covered by | -- |The whole inhaled in the form of| |hood, and having fumes | |vapour of lead or similar | |exhausted by draught of | |compound. | |furnace | | | |Wiping off (tinning) | -- |14·1 milligrammes of metallic | |furnace | |lead inhaled as lead chloride, | |furnace | |and 21·1 milligrammes as | |furnace | |metallic lead adhering to | |furnace | |floating fibres of tow. | |Earthenware dipping (pottery)| 8·30|Dipping boards not used. | | | | | |Earthenware dipping (pottery)| 7·42|Very dirty dipping boards used. | |furnace | |Work very rapid, and much | |furnace | |shaking of ware after dipping. | |China dipping (pottery) | 5·43|China glaze usually contains | | | |about two-thirds as much lead as| | | |that of earthenware. | |Rockingham ware dipping | 4·37|Dirty dipping boards in use. | |(pottery) | |Glaze contains three times as | | | |much lead as ordinary earthen- | | | |ware glaze, but the ware is not | | | |shaken after dipping. | |Earthenware cleaning | 5·90|Cleaning done in or at front of |