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depending on a single blood count in studying an industrial hazard. But if an
abnormal count is encountered the subject should be examined at repeated inter-
vals. We examined some of the girls two or throe times, and cases where we had
found a white count around 6000 on the first examination an increase to around
the average forithe group was noted in the succeeding examinations.
We also xamined the blood of our animals at regular intervals during
our experiments and could not detect any changes that did not appear in the
normal animals. A histological examination of the jaws of the exposed animal
did not show any change. Here again we must emphsize the fact that we realize
that six months exposure is too short a time to expect any noticeable changes
from an exposure to these minute quantities of radio-active salts. On the other
hand x-ray pictures taken of the jaws of girls exposed a number of years to the
material did not indicate any tissue changes and as we have stated their gums
and muoous membrane of the oral cavity were all in excellent shape. Dr. R.C.
Williams(4) has adopted 7500 W.B.C. with plus or minus ten percent as his normal
for the rad ium workers at the Bureau of Mines. This is, of course, the mean of
5000 to 10000 which is taken as the usual normal limits for all conditions of
nutrition.
From the faots that we have presented one would feel justified in
arriving at the conclusion that an industrial hazard did not exist in the luminous
dial painting if it were not for the deaths in Orange. Two of the girls in England
seem to give a slight indication of some exposure. Statistically also the
evidence is against the assumption that suoh a hasard existed. If it were not
so we would have every reason to expect to regeive reports of other cases among
the four or five thousand girls who have been engaged in this work in Europe and
this country. Furthermore cases should have made their appearances in other
factories besides the Orange Plant inasmuch as these other girls have used the
same material and have worked as long in the industry.
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"ocrText": "-16-\ndepending on a single blood count in studying an industrial hazard. But if an\nabnormal count is encountered the subject should be examined at repeated inter-\nvals. We examined some of the girls two or throe times, and cases where we had\nfound a white count around 6000 on the first examination an increase to around\nthe average forithe group was noted in the succeeding examinations.\nWe also xamined the blood of our animals at regular intervals during\nour experiments and could not detect any changes that did not appear in the\nnormal animals. A histological examination of the jaws of the exposed animal\ndid not show any change. Here again we must emphsize the fact that we realize\nthat six months exposure is too short a time to expect any noticeable changes\nfrom an exposure to these minute quantities of radio-active salts. On the other\nhand x-ray pictures taken of the jaws of girls exposed a number of years to the\nmaterial did not indicate any tissue changes and as we have stated their gums\nand muoous membrane of the oral cavity were all in excellent shape. Dr. R.C.\nWilliams(4) has adopted 7500 W.B.C. with plus or minus ten percent as his normal\nfor the rad ium workers at the Bureau of Mines. This is, of course, the mean of\n5000 to 10000 which is taken as the usual normal limits for all conditions of\nnutrition.\nFrom the faots that we have presented one would feel justified in\narriving at the conclusion that an industrial hazard did not exist in the luminous\ndial painting if it were not for the deaths in Orange. Two of the girls in England\nseem to give a slight indication of some exposure. Statistically also the\nevidence is against the assumption that suoh a hasard existed. If it were not\nso we would have every reason to expect to regeive reports of other cases among\nthe four or five thousand girls who have been engaged in this work in Europe and\nthis country. Furthermore cases should have made their appearances in other\nfactories besides the Orange Plant inasmuch as these other girls have used the\nsame material and have worked as long in the industry."
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