Displays the beginning of the 20th century vintage Paul Pfurtscheller Zoological wall graphic, worm

Wall chart the anatomy of the "Ascaris lumbricoides' large-scale (Vermes III, Ascaridae). Lithograph on two sheets of paper, mounted on canvas. Author and Illustrator was Professor Paul Pfurtscheller. Pfurtscheller (1855-1927) produced a series of 39 'Beaitifull Wandtafeln' (Zoological wall plates) to be used for higher education purposes. Although he was a high school teacher in modest training he won the recognition by the scientific community in the world for this outstanding work. The worm is 'Plate 38' in the series. Pfurtscheller wall paintings were first published in Vienna, Austria, in 1902, by 'widow & Sohn of A. Pichler. This article was published by the Dutch company 'Martinus Nijhoff' likely around 1929. Later editions were published by the Dutch company "Martinus Nijhoff" until 1953. This article was published by "Martinus Nijhoff" Dutch society. It is one of the editions very early on all sides, while later editions used offset printing. Lithograph of course, is an extremely demanding technique - especially at this large scale - which required up to 20 cycles of manual printing for a single piece, because each color had to be applied separately. These colors of course should not be to ride in the end. This process is giving lithographs, their depth and their unusual longevity to their colors.