The periodoscope
Subtitle: with its application to obstetric calculations, and the periodicities of the sex
By: By W. Tyler Smith
Publisher: J. Churchill
Published: 1848
Place of publication: London
Language: eng
Number of pages: 47
Subjects: Pregnancy; Menstruation
Notes: Includes "Periodoscope" a movable disc used for calculating menstrual period for delivery dates (between p. viii and 1)