
Medical books are a self-diagnosed weakness of mine. This is one of my favorites. It may look familiar, I picked up this 1910 edition at a doctor's estate sale a few years after this came out, whose packaging and booklet was reproduced from a 1920's edition.

Many vintage medical encyclopedias have fold out 'manikins' {as
Vitalogy describes them} - these four layers display the brain and neck
muscles, the center of the head, the arteries and veins and the
principles of Phrenology.

Another manikin, this one a favorite, it keeps opening like a book.
Vitalogy also makes for interesting reading, take this for example:
"Young man, if you want your wife to be as attractive in your sight and as loving toward you after marriage as before, see to it that you occupy SEPARATE APARTMENTS most of the time."

An illustration demonstrates the physical response from a snake bite. Another warns us of ' The Greatest Destroyer Of Health, Life And Beauty In The Civilized World ..... The Waist Belt'.
{Oh, how I wish that was the worst of our problems.}