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
“The mixture of lead and tin is heated over a bright fire in a
shallow iron pan. As it melts, the top scum which forms is skimmed
off, dried, pounded to a powder in an iron mortar, and afterwards
sieved. The person who does this work always suffers more or less.
He usually protects himself by wearing a respirator--there is a good
draught at the flue, and the sieve is enclosed in a box--but there
is always a certain amount of dust. This putty-powder is used on the
wooden wheel, and is dabbed on the wheel as it revolves. All good
bold work can be polished in this way, and there is not much risk
to the workman, as the speed at which the wheel revolves causes the
mixture to cling and not fly about. This process does not answer
for any fine work, so it is contended; and to enable this kind of
work to be properly polished brushes made of bristles are used. They
are mounted on an iron spindle, and are usually about 6 inches to 7
inches in diameter, with a face of 1 inch to 1¹⁄₂ inches broad. They
are driven at a speed of about 2,000 revolutions a minute. The putty
powder is applied to these brushes (which are of various sizes) in
the same way as to the wooden wheel--that is, by dabbing it on. For
smaller work, such as tumblers and wine-glasses, the workman applies
the putty mixture himself, holding the glass against the brush with
his right hand, and using his left underneath to apply the mixture.
Where, however, larger work has to be done in which the workman
cannot manage with one hand, the service of a boy is called in, who
does what is called the ‘feeding up.’ This boy stands partly in front
and partly at the side of the brush, and applies the mixture with one
hand with the wisp of straw. In this position the boy gets splashed
with the putty mixture which flies off the brush, and it is generally
believed by the workmen to be the most dangerous occupation. At
one time--not very long ago--all the various processes of the work
were done indiscriminately in the workshop, and consequently the
men were frequently found working in a perfect haze of fine dust,
which had been thrown off from the brushes. There was no attempt
made to separate and detach the less injurious part of the work,
such as the roughing and cutting, from the general workshop, the
lead polishing only occupying about one-fifth of the workmen’s time.
After the glass has been polished by the putty it is taken away to
another department, where girls are employed as ‘wipers out.’ They
take the glass with the dried putty upon it, dip it into a basin of
water, and then wipe it dry. Some of these girls have been known
to suffer from lead poisoning.... Drop-wrist was frequently to be
seen--in fact, there was hardly a workshop in the district in which
cases of wrist-drop could not be found. They were all anæmic, and the
albuminuric and prematurely aged were frequently met with.”
Public-domain text, read in full here on John Shaqi.
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