PERIODOSCOPE
\pˈi͡əɹɪədˌɒskə͡ʊp], \pˈiəɹɪədˌɒskəʊp], \p_ˈiə_ɹ_ɪ__ə_d_ˌɒ_s_k_əʊ_p]\
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A table or other means for calculating the periodical functions of women.
By Oddity Software
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A table or other means for calculating the periodical functions of women.
By Noah Webster.
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An instrument, proposed by Dr. Tyler Smith, for the ready calculation of the periodical functions of the sex. It consists of a movable circular dial, upon which the months and days are engraved, fixed on a pivot in the centre of a large plate on which are numbered the different conditions of the reproductive system, as conception, abortion, premature labour, hemorrhage, labour, &c. By a knowledge of the date of conception, say November 14th, and fixing the movable plate opposite the point on the fixed plate which indicates conception, the observer is stabled, at once, to see, that, allowing 280 days for gestation, labour may be expected about the 20th of August. The dial is made of card-board, and is affixed to a small volume, in which its uses and applications are explained.
By Robley Dunglison
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