By: Walter Levi Yaggy
Date: 1893 (published) Chicago, IL
Dimensions: 24 x 36 inches (61 x 91.5 cm)
This is a superb diagram with moving parts demonstrating the continual changes in season and tides as the Earth orbits the sun. The work was part of Levi Walter Yaggy's 1893 Geographical Portfolio, published as an educational tool for high schools and colleges. The entire portfolio consisted of nine illustrated charts, and maps as well as two movable diagrams of presenting celestial phenomena, all housed in a wooden cloth-wrapped case.
Yaggy's diagram is presented in three sections, the Earths orbit showing parallel axes, changing seasons based on the Earths axes in relation to the sun and the ever-changing tides of the ocean with relation to the gravitational pull of the moon. This chart features two functional moving parts that demonstrate these changes when used, a most practical function for any teacher to utilize when instructing their class, especially during the late 19th century.
This diagram, like many from these portfolios came into us warped and in a non-functional condition. We have since flattened the piece so that all moving parts rotate with ease. It looks particularly brilliant when lit from behind and would make an amazing piece of historical wall art if displayed in a backlit frame.
Levi Walter Yaggy (1848 - 1912) Was born in Plainfield Illinois to Jacob and Elizabeth Yaggy. He attended Northwestern College in Naperville, Illinois before moving to Chicago where he would found the Great Western Publishing House in 1874. He business would enjoy great success, ultimately expanding to include seventeen branch offices throughout the United States and employing thousands. Yaggy primarily focused on creating maps and educational books and portfolios for high schools and colleges that included "Museum of Antiquity; A Description of Ancient Life...," "The Standard History of All Nations and Races…," and "Yaggy’s Anatomical Study; Presenting the Skeleton, Muscles, Arteries, Veins and Nerves...," among others.
Condition: This print is in A condition, flattened and entirely functional with no breaks around the border and minimal scuffing. Some signs of previous water damage are visible on the verso, but will no longer have a negative effect on the piece.
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