Diehl's Anatomy for Artists and Students

This portfolio of four prints was published by Devoe and Company, a manufacturer and importer of art supplies.

From a biography at Questroyal Fine Art:

Conrad Diehl was a well-regarded landscape, history, and still life painter, who also had a noted career as an art instructor and author. Born in Germany, Diehl spent his childhood in the Midwest; his father’s status as a revolutionary leader forced the family to flee to the United States after the German Revolution of 1848. Diehl returned to Europe in 1860 to study art in Munich and train under Jean Leon Gerome in Paris.

He began his career as an educator in 1868 at the Chicago Academy of Design and after three years moved to the St. Louis Art School. In 1873 he received a patent for an improved perspective apparatus. He authored many publications including "Art as the first condition in the formation of society," and "Manual of Linear Drawing." - American biography: a new cyclopedia, Volume 5 By American Historical Company

See the prints on Ebay.

CONRAD DIEHL - Chromolithographs - Anatomy for Artists and Students at Live Auctioneers, another set of the prints at the George Glazer Gallery
Two cartoons of Conrad Rossi Diehl , one is title Labor and Capital recognize their common enemy, the other Monopoly mows down the trades and small capital.

Anatomy for Artists (Dover Anatomy for Artists)