![](http://www.alamy.com/thumbs/6/7C20CD96-3D03-4059-93F3-FA73BDEECB8D/J3T98C.jpg)
Invariable pendulum00
Size: 906px × 2759px
Photo credit: © The History Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ancient, art, book, bygone, copy, cover, drawing, editorial, historic, history, illustration, line, map, news, painting, photo, photograph, photography, space, stock, textbook, vintage