Lecture on the Cause and Control of Sex in Human Offspring by R. Clay Jackson of Redmond, Wash. [opening lines of broadside].

“Railroads and stone quarries that produce too many baby girls…”

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Fantastically foolish, an attempt by one man to convince the world that a child’s sex could be prognosticated using weather charts and/or by how much sun exposure a woman had during her pregnancy:

The author is under the peculiar delusion that he has proved that exposure to sunlight is the determining factor in establishing the sex of the progeny, the mother lending the factors for femaleness and the father the factors for maleness. He presents evidence principally in the form of weather charts and statistics gathered without the slightest scientific attempt to control the observations. The book is published by the author [see below], presumably at his own expense. It is miserably printed, bound in an ornamental cover, and is quite unconvincing. [Whew!]

With this broadside issued sometime during the Second World War, Jackson is still pushing his odd theories previously presented in his 1926 book The Cause and Control of Sex in Human Offspring (Washington, 1926) and, seven years later, within The Transmission of Sex and its Pathological Significance (Washington 1933).

Jackson’s lecture included using a stereopticon to challenge “the entire world of science to the acknowledgment of his priority. Rainfall and daughters; droughts and sons. Railroads and stone quarries that produce too many babies. Why girls are in the majority among illegitimate births…Stillbirths and their relation to industrial stresses…”

Jackson’s lecture would be a family affair, nothing salacious here, a lecture where both mothers and fathers could attend. The lecture was only fifty cents—(Including War Tax).

Presumably unrecorded and perhaps more than a head-scratcher and a smile.

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