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November 30, 1935


Author Affiliations

Associate Professor of Medicine, Temple University Medical School.

Member of Department of Physics, University of Pennsylvania. Philadelphia.

JAMA. 1935;105(22):1792. doi:10.1001/jama.1935.02760480062022

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To the Editor:—  In 1933 one of us (M. G. W.) published a paper on the polarization capacity of the skin as an index of thyroid function (Endocrinology17:299 [May-June] 1933). Three months later there appeared a paper by Dr. M. A. B. Brazier (Lancet2:742 [Sept. 30] 1933) dealing with the same subject but designating the method as measuring the impedance angle. In The Journal, October 12, page 1211, in reply to a query on the impedance angle test for thyrotoxicosis, you state that "American workers fail to corroborate the English observations." This statement requires correction. In the paper published in Endocrinology calling the method a polarization capacity, the results substantially agree with those of Dr. Brazier with the following difference: While the polarization capacity as well as the impedance angle was found to be high in thyrotoxicosis, we found that the polarization capacity was not correlated

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