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can do harm most be the radium. The profound effect of radium even in minute
quantities on living cells 1s too woll-knom to require more than mero mention.
In addition, exporimental evidence is not wanting to show that there may be
solective deposit of radium in bone, and that the effects of radiations of the
sort amitted by radium may provent both bone growth and the repair of fractures.
A necrotic process in the jow bone itself, strikingly like that occurring in
employees of the Radárm Corporation, has been reported in four instances following
the use of radium in the mouth for therapeutic effect on cancer of the tongue.
with this evidence for radium as the probable tozie factor, we endoavored
to determine the extent and made of exposure to redium experienced by the Bradium
Corparation employees.
CONDITIONS OBSERVED AT THE PLANT
We found the girls employed in painting dials in a large well-liented
roome The fnet that the "Undark" to bo used in mizing the luminous paint de
issued to the worlcors in very small amounts (1 to a gna) in amall containers as
required, made it soem, at first glance, as if the possibility of dissemination
of the material was very slight. Yet the clothes and the persons of mony of the
workers were snid to be luminous in the dark following expesure to light.
By means of this "flash" test and eximation in the darkroom, we were
able to show that the nir of the vorloroom mat contain sine sulphide. Dost samples
collected in the worlopoom from various locations tables,chandeliors,mal beams,
etc.), and from chairs not used by the workers were all luminous in the dark-Toom.
The dreesos, the underclothes, evon the corsets,
of the dial paintors are luminous. one of the girle essmined with her dress orf
by Urs. Drinicer showed luminous spots on her legs and thighs. The brok of another
was Ivinous nimost to her waist. Droet from the machine shop below was luminous,
and the same property was exhibited by office girls and by others about the plant
not employed in thopainting room. This, we thinic, is evidence that "Undark" is
being carried in suspension about the paint-Foom and even beyond its confines.
Some quantitativo notion of the rete of deposition is mined from the faet that
dresses worn in the painting room for only a few hours berdn to exhibit a general
luminosity in the dark following exposure to light. The conclusion seems to us
inevitable that, if #undark" is the Bource of this luminous dust, the dust must
necessarily contain radium.
Dust somples collected from varãous places recently oiled - and this duet
mant have gettled long since the one-time process of spraying with a pure zine
sulphide base was discontinued -- is squally luminous. The fnet that the luminosity
fedes airay in the derk is meroly an expression of the fnet that the temporary ro-
sponse of the sulphide to licht is for greater than the permanent luminosity
produced in the sulphide by the redium. In our opinion, the luminosity, for
example, in the sidins of the workors, is due to "Undork" which is present in such
small quantities as not bo be seen unless flashed. Thore can be no comparison
between the amount of "Undark" porsisting in the akin after vigouous washing and
the rather thick stroak of the paint on the dial of a wathh. The
transioney
of
the luminosity is not a proof that the siring do not contain radium, but morely
that they do not contain enouch radivm to confer sponteneous visible luminosity.
The esme reasoning is applicable to the dust samples.
We are at prosent engaued in analyzing for radium the dust samples which
we collected. The results are, so far, negativo, - a fact which de not surpris-
ing in vior of the extremoly small quantity of radium combined with the zine
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"ocrText": "can do harm most be the radium. The profound effect of radium even in minute\nquantities on living cells 1s too woll-knom to require more than mero mention.\nIn addition, exporimental evidence is not wanting to show that there may be\nsolective deposit of radium in bone, and that the effects of radiations of the\nsort amitted by radium may provent both bone growth and the repair of fractures.\nA necrotic process in the jow bone itself, strikingly like that occurring in\nemployees of the Radárm Corporation, has been reported in four instances following\nthe use of radium in the mouth for therapeutic effect on cancer of the tongue.\nwith this evidence for radium as the probable tozie factor, we endoavored\nto determine the extent and made of exposure to redium experienced by the Bradium\nCorparation employees.\nCONDITIONS OBSERVED AT THE PLANT\nWe found the girls employed in painting dials in a large well-liented\nroome The fnet that the \"Undark\" to bo used in mizing the luminous paint de\nissued to the worlcors in very small amounts (1 to a gna) in amall containers as\nrequired, made it soem, at first glance, as if the possibility of dissemination\nof the material was very slight. Yet the clothes and the persons of mony of the\nworkers were snid to be luminous in the dark following expesure to light.\nBy means of this \"flash\" test and eximation in the darkroom, we were\nable to show that the nir of the vorloroom mat contain sine sulphide. Dost samples\ncollected in the worlopoom from various locations tables,chandeliors,mal beams,\netc.), and from chairs not used by the workers were all luminous in the dark-Toom.\nThe dreesos, the underclothes, evon the corsets,\nof the dial paintors are luminous. one of the girle essmined with her dress orf\nby Urs. Drinicer showed luminous spots on her legs and thighs. The brok of another\nwas Ivinous nimost to her waist. Droet from the machine shop below was luminous,\nand the same property was exhibited by office girls and by others about the plant\nnot employed in thopainting room. This, we thinic, is evidence that \"Undark\" is\nbeing carried in suspension about the paint-Foom and even beyond its confines.\nSome quantitativo notion of the rete of deposition is mined from the faet that\ndresses worn in the painting room for only a few hours berdn to exhibit a general\nluminosity in the dark following exposure to light. The conclusion seems to us\ninevitable that, if #undark\" is the Bource of this luminous dust, the dust must\nnecessarily contain radium.\nDust somples collected from varãous places recently oiled - and this duet\nmant have gettled long since the one-time process of spraying with a pure zine\nsulphide base was discontinued -- is squally luminous. The fnet that the luminosity\nfedes airay in the derk is meroly an expression of the fnet that the temporary ro-\nsponse of the sulphide to licht is for greater than the permanent luminosity\nproduced in the sulphide by the redium. In our opinion, the luminosity, for\nexample, in the sidins of the workors, is due to \"Undork\" which is present in such\nsmall quantities as not bo be seen unless flashed. Thore can be no comparison\nbetween the amount of \"Undark\" porsisting in the akin after vigouous washing and\nthe rather thick stroak of the paint on the dial of a wathh. The\ntransioney\nof\nthe luminosity is not a proof that the siring do not contain radium, but morely\nthat they do not contain enouch radivm to confer sponteneous visible luminosity.\nThe esme reasoning is applicable to the dust samples.\nWe are at prosent engaued in analyzing for radium the dust samples which\nwe collected. The results are, so far, negativo, - a fact which de not surpris-\ning in vior of the extremoly small quantity of radium combined with the zine"
}