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The two 5 micro ampoules of radium solution were put in Schlundt's
vest pockets as he sat in chair with back to electroscope, and readings were ma de
by Flinn.
71 - 66
-
71 - 63
18' - 5° or 0.00922 d. P° sec.
Deducting natural drift
0.00867 " 11 " leaves a net
increase of
0.00055 11 " "
a value slightly less than was obtained in the enrlier experiment with Dr. Flinn
in chair.
The natural drift was then takon again by both observers:
Schlundt
68 - 44
in
48' -
or
0.00824 d.p.sec.
Flinn
67 - 45
11
44's - 20°1
11
0.00827 d.p.sec.
Average
0.00825 11 " "
Schlundt in chair without Radium standard = .00874 d.p.sec (see above). Deducting
last natural drift of 0.00825 leaves a positive effect due to 10 micrograms of
0.00049 d.p.sec., as against 0.00077 for Flinn with 2 - 5 microampoules on his
person in the form of a long column of liquid.
Is this difference due entirely to difference in form of standard used?
Answer: Only partly so, because in making measurements with standards in vest
pockets of Schlundt the tubes are a greater distance from instrument,
After lunch we made another test to determine the radium content of the
sample of expired air obtained about 20 hours before from Mrs. Dumschoff at Nau-
gatuck.
2730 cc of expired air was introduced into the ionization chamber, No.15
U. S. Radium Corporstion, the natural drift having been found first to be 0.0230 d.p.sec
The expired air was introduced at 3:50 and the first reading was made at 3:55,
E 5 minutes later.
At 3:55
90 - 85
2° - 55°°
or
0.0286 d. p.sec.
90- 78
7' - 53'8
"
0.0253 "
11
11
77 - 67
7 1- 2°
11
0.0237 "
"
"
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"ocrText": "page - 2 -\nThe two 5 micro ampoules of radium solution were put in Schlundt's\nvest pockets as he sat in chair with back to electroscope, and readings were ma de\nby Flinn.\n71 - 66\n-\n71 - 63\n18' - 5° or 0.00922 d. P° sec.\nDeducting natural drift\n0.00867 \" 11 \" leaves a net\nincrease of\n0.00055 11 \" \"\na value slightly less than was obtained in the enrlier experiment with Dr. Flinn\nin chair.\nThe natural drift was then takon again by both observers:\nSchlundt\n68 - 44\nin\n48' -\nor\n0.00824 d.p.sec.\nFlinn\n67 - 45\n11\n44's - 20°1\n11\n0.00827 d.p.sec.\nAverage\n0.00825 11 \" \"\nSchlundt in chair without Radium standard = .00874 d.p.sec (see above). Deducting\nlast natural drift of 0.00825 leaves a positive effect due to 10 micrograms of\n0.00049 d.p.sec., as against 0.00077 for Flinn with 2 - 5 microampoules on his\nperson in the form of a long column of liquid.\nIs this difference due entirely to difference in form of standard used?\nAnswer: Only partly so, because in making measurements with standards in vest\npockets of Schlundt the tubes are a greater distance from instrument,\nAfter lunch we made another test to determine the radium content of the\nsample of expired air obtained about 20 hours before from Mrs. Dumschoff at Nau-\ngatuck.\n2730 cc of expired air was introduced into the ionization chamber, No.15\nU. S. Radium Corporstion, the natural drift having been found first to be 0.0230 d.p.sec\nThe expired air was introduced at 3:50 and the first reading was made at 3:55,\nE 5 minutes later.\nAt 3:55\n90 - 85\n2° - 55°°\nor\n0.0286 d. p.sec.\n90- 78\n7' - 53'8\n\"\n0.0253 \"\n11\n11\n77 - 67\n7 1- 2°\n11\n0.0237 \"\n\"\n\""
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