Author: Stopes, Marie Carmichael
Title: Coital Interlocking - a Physiological Discovery
Description: Mother's Clinic for Constructive Birth Control, 1930. Soft Cover. 6p booklet announcing Stopes discovery of Coital Interlocking - she suggests that the opening cervix may clamp down upon the penis during intercourse - not later confirmed by Masters & Johnson ! Original clean pale green card cover with faint Leplay House Library stamp on front cover. No other marks, clean and tight. Original Edition. One of a number of books I am listing of Marie Stopes and associated material. . Very Good

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