Synthesized answer
The provided passages do not contain information about the evidence the author provides in "Vom Baue des menschlichen Körpers." The passages only include the title of the work, the names of associated individuals, and a page number [386]. Therefore, it is not possible to answer the question regarding the evidence presented by the author.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: Samuel Thomas von Sömmering vom Baue des menschlichen Körpers by Rudolph Wagner, Samuel Thomas Sömmerring (von.), Theodor Ludwig Wilhelm Bischoff Pages: 386