Vintage Swedish Skeletons Anatomy of Amphibians Pull-Down Wall Chart

The rollable Swedish wall chart illustrates the bone structure of amphibians (frog and salamander). colorful print on paper reinforced with canvas. Ryggradsjurens Byggnad 09. Graddjur. measurements: Width: 69cm (27.17 inch) Heigth: 99 cm (38.98 inch) The measurements shown refer just to the canvas and do not include the poles. Background information on the history of school wall charts: The idea to upgrade every day school life by using pictures was supported in the late 18th century by Johann Bernhard Basedow. In 1774 he published a four-volumned book "Elementarwerk" which combined pictures, text and information with merely hundred copperplates. Modern printing methods enabled the spread from rich private schools to rural grade schools. From 1820-1836 the oldest mentioned series of wall charts were published with the range of six booklets including 63 large sized charts. The rising 20th century was the golden age for publishers printing wall charts. Artists Masterly performed pictures which combined the subject-specific standards of a scientist with the standards given by an educator and finally created a magnificat art work.