Centrifugal and Centripetal Force, Circles and Planes, Kepler's Laws, Mean and True Place of the Earth or a Planet

Method Woodcut
Artist Smith, Asa
Published [By Asa Smith. Boston: Samuel F. Nichols, 43 Washington Street. 1866]
Dimensions 255 x 210 mm
Notes A mid-nineteenth century astronomical chart, showing a series of diagrams, from the 1866 edition of 'Smith's Illustrated Astronomy.' The top three illustrations show centrifugal and centripetal force, as a means of demonstrating the actions of the orbits. A further three below this demonstrate the relationship between a circle and an ellipse in viewing the orbits obliquely, the concentric circles of the planets when viewed in the same plane, and the impression created by circles not in the same plane. The final two diagrams, the largest on the sheet, show Kepler's Laws, and an overlay representing the Mean and True Place of the Earth in its orbit.

Smith's Illustrated Astronomy, Designed for the Use of the Public or Common Schools in the United States was a general astronomical textbook, first published in 1848 but improved and reprinted a number of times. The author, Asa Smith, described himself as 'Former Principal of Public School No. 12, City of New York,' and the text of the book is designed as a number of lessons, positing questions that teachers could address to their pupils, along with the answers, both simplified and in depth. Smith's knowledge of his subject was enthusiastic but often flawed, perpetuating numerous mistruths or historical misunderstandings, particularly in regards to the historical appreciation of astronomy. The most egregious of these occurs in Smith's very first lesson, which denies any ancient knowledge of the spherical shape of our planet, instead telling students that ancient peoples believed the world to be a flat disc supported by an elephant or a turtle. While true for some Huron, Hindu, and Chinese mythemes, it in no way compares to the beliefs of the classical astronomers upon which Smith purports to rely. For later editions, the numerous illustrations and diagrams were updated and improved by Prof. Newcomb from Harvard's Astronomical Department, though the lessons themselves remained relatively unchanged.

Asa Smith (fl.1848) was a New York based educator, best known for his very popular Illustrated Astronomy, a textbook created for use by American Public Schools.

Condition: Minor time toning and foxing to edges of sheet. English text on verso.
Framing unmounted
Price £75.00
Stock ID 50429