Lead poisoning and lead absorption : $b The symptoms, pathology and prevention, with special reference to their industrial origin, and an account of the principal processes involving riskLegge, Thomas Morison, Sir
Science
Lead poisoning and lead absorption : $b The symptoms, pathology and prevention, with special reference to their industrial origin, and an account of the principal processes involving risk
Legge, Thomas Morison, Sir
Lead poisoning
+----------++------+------+------+------+
| || |Attack| Total|Attack|
| || | Rate |Cases,| Rate |
| || Total| per | M. & | per |
| ||Cases.|1,000.| F. |1,000.|
+----------++------+------+------+------+
|1899 M.|| 128 | 29} | 249 | 37 |
| F.|| 121 | 53} | | |
|1900 M.|| 95 | 22 }| 200 | 30 |
| F.|| 105 | 46 }| | |
|1901 M.|| 57 | 13} | 106 | 16 |
| F.|| 49 | 21} | | |
|1902[A] M.|| 40 | 9 }| 87 | 13 |
| F.|| 47 | 20 }| | |
|1903 M.|| 43 | 10} | 97 | 14 |
| F.|| 54 | 23} | | |
|1904[B] M.|| 39 | 9 }| 106 | 16 |
| F.|| 67 | 29 }| | |
|1905 M.|| 36 | 8} | 84 | 13 |
| F.|| 48 | 21} | | |
|1906 M.|| 47 | 10 }| 107 | 16 |
| F.|| 60 | 25 }| | |
|1907 M.|| 52 | 12} | 103 | 15 |
| F.|| 51 | 22} | | |
|1908 M.|| 56 | 12 }| 117 | 17 |
| F.|| 61 | 26 }| | |
|1909 M.|| 28 | 6} | 58 | 8 |
| F.|| 30 | 13} | | |
+----------++------+------+------+------+
[A] Lord James’s Code--Rule 3 onwards--came into force.
[B] Medical examination of men began.
The processes in so far as lead enters can best be divided into--(1)
Glaze; (2) decorative.
1. _Glaze Processes._--The charge of glaze is made by weighing
out and mixing carbonate of lead with the necessary silicates and
silico-borates in the lead house or mixing-room, where wet grinding
prepares the mixture for the dipping-tub. “Putters-up” hand the ware
to the dipper, from whom “takers-off” place it on boards for removal
to the drying still, or place it (in large works) directly on to the
shelf of an appliance known as a “mangle,” in which an endless chain
carries the ware through a heated chamber. Subsequently superfluous
glaze has to be removed from the base, rims, and not infrequently also
other parts of the articles. This ware cleaning is performed with a wet
sponge or flannel, either while the ware is still moist or by scraping,
the particles removed dropping into a vessel of water; or, if the glaze
is dry, over a grating provided with exhaust draught. The ware is next
removed by the glost-placer on boards, and each piece is separately
placed by him in the sagger (fireclay receptacle) and carried into an
oven to be fired.
2. _Decorative Processes._--Majolica painting is the application of a
coloured glaze rich in lead by means of a brush. Ground-laying consists
in dusting powdered enamel colour on to a pattern first printed on
glazed ware with an oily medium. Colour dusting differs from the same
only in detail.
Public-domain text, read in full here on John Shaqi.
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