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Test on Miss Grace Freyer: The first person tested by this method was Miss
Grade Freyer. The natural drift of the instrument before readings were made
with Miss Freyer in the chair close to the electroscope, was found by Dr. Flinn
as 10 divisions of the scale in 11 min 2 sec., or 0.01510 divisions per second,
Independent readings by Schlundt gave a natural drift of 0.01484 divisions per
second. The average of these very closely agreeing values is 0.01497 divisions
per second (d.p.sec.) Directly after these readings Miss Grace Freyer was
seated in the chair with har beck close to the instrument and readings Of the
drift were again taken by each of us. The value found by Flinn was 0.01510
d.p. sec., by Schlundt 0.01504, again very closely agreeing values, and what is
all important, that the average of these two readings, 0.01507, is far within
the limits of experimental error, the same as the natural drift.
Miss Freyer's posture was then changed so that she faced the testing
electroscope, which was then in front of her opposite her breast. Two inde-
pendent readings were again made, as given in the following table:
Drift
Observer
Scale divisions
time
Divisions per second.
Flinn
61 - 50 (11)
12° - 18**
0.01491
Schlundt
59 - 49 (10)
11' -
0.01493
Average
0.01492 divisions per second
The natural drift of the instrument was then taken again, and found to be as follows:
Drift
Observer
Scale Divisions
time
Divisions per second
Flinn
69 - 64 (5)
5° - 26'1
0.01534
Schlundt
67 - 61 (6)
6' - 32*
0.01531
Average
0.01533 divisions per second
Now let us summarize these tests:
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"ocrText": "Page -2-\nTest on Miss Grace Freyer: The first person tested by this method was Miss\nGrade Freyer. The natural drift of the instrument before readings were made\nwith Miss Freyer in the chair close to the electroscope, was found by Dr. Flinn\nas 10 divisions of the scale in 11 min 2 sec., or 0.01510 divisions per second,\nIndependent readings by Schlundt gave a natural drift of 0.01484 divisions per\nsecond. The average of these very closely agreeing values is 0.01497 divisions\nper second (d.p.sec.) Directly after these readings Miss Grace Freyer was\nseated in the chair with har beck close to the instrument and readings Of the\ndrift were again taken by each of us. The value found by Flinn was 0.01510\nd.p. sec., by Schlundt 0.01504, again very closely agreeing values, and what is\nall important, that the average of these two readings, 0.01507, is far within\nthe limits of experimental error, the same as the natural drift.\nMiss Freyer's posture was then changed so that she faced the testing\nelectroscope, which was then in front of her opposite her breast. Two inde-\npendent readings were again made, as given in the following table:\nDrift\nObserver\nScale divisions\ntime\nDivisions per second.\nFlinn\n61 - 50 (11)\n12° - 18**\n0.01491\nSchlundt\n59 - 49 (10)\n11' -\n0.01493\nAverage\n0.01492 divisions per second\nThe natural drift of the instrument was then taken again, and found to be as follows:\nDrift\nObserver\nScale Divisions\ntime\nDivisions per second\nFlinn\n69 - 64 (5)\n5° - 26'1\n0.01534\nSchlundt\n67 - 61 (6)\n6' - 32*\n0.01531\nAverage\n0.01533 divisions per second\nNow let us summarize these tests:"
}