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7.
sulphate. The question arose in our nind t.s. to whether any of the radium material
could be absorbed thraugh the intestinal walls. We fod three guinea piga 100 ags.,
of luminous paint coataining 2.90 of radium material por hundred grams of paint
must the stomach
daily by placing the powder down its throat and then washing it with the minimam
N
out
amount of water. The pig was watched to be surs that it did not spit any of the material
out. This was kept up until esch pig had ingested two grams of thecpaint. Tex days
after the last dose the pigs were killed with ether and dissectod. Nome of the organs
showed any signs of the treatment. At the begimning of the experiment the piga were
quiet, but after sevoral days became active and ate very freely. The feces and urins
were collected and tested forvradio-aetivity. The organs were examined separately, but
on
this does not mean so moch for wie did not drain the body of its blood before dissecting
In determiming the radio activity a specially constructed type of Alpha ray electro-
scope was used. First the natural drift, that is the time required for the quartz
film to pass over a definite mumber of divisions in the eye piece was determined, with
the physical conditions in the instrument the same s.s when the sample was to be
read.
The sample was then introduced and the time required determixed for the quartz fibre
to pasa over the same divisions as used in the xatural drift. It is obvious that any
change in the rate of movement of the fibre mist be ascribed to a change
by the iomization of the air within the chamber due to the presente of radio-active
substances.
We are giving our average determinations on the three piga in the folbowing table;
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"ocrText": "7.\nsulphate. The question arose in our nind t.s. to whether any of the radium material\ncould be absorbed thraugh the intestinal walls. We fod three guinea piga 100 ags.,\nof luminous paint coataining 2.90 of radium material por hundred grams of paint\nmust the stomach\ndaily by placing the powder down its throat and then washing it with the minimam\nN\nout\namount of water. The pig was watched to be surs that it did not spit any of the material\nout. This was kept up until esch pig had ingested two grams of thecpaint. Tex days\nafter the last dose the pigs were killed with ether and dissectod. Nome of the organs\nshowed any signs of the treatment. At the begimning of the experiment the piga were\nquiet, but after sevoral days became active and ate very freely. The feces and urins\nwere collected and tested forvradio-aetivity. The organs were examined separately, but\non\nthis does not mean so moch for wie did not drain the body of its blood before dissecting\nIn determiming the radio activity a specially constructed type of Alpha ray electro-\nscope was used. First the natural drift, that is the time required for the quartz\nfilm to pass over a definite mumber of divisions in the eye piece was determined, with\nthe physical conditions in the instrument the same s.s when the sample was to be\nread.\nThe sample was then introduced and the time required determixed for the quartz fibre\nto pasa over the same divisions as used in the xatural drift. It is obvious that any\nchange in the rate of movement of the fibre mist be ascribed to a change\nby the iomization of the air within the chamber due to the presente of radio-active\nsubstances.\nWe are giving our average determinations on the three piga in the folbowing table;"
}