A group of eleven copper-plate engravings PLANETARY MACHINES Each engraved by Wilson Lowry for The Cyclopedia and inscribed Published as the Act Directs, by Longman, Hurst, Rees, Orme, & Brown (except for numbers I and IV which excludes & Brown) Paternoster Row, including a COMETARIUM by W. Jones (numbers I and II); a PLANETARIUM, of the Royal Institution by Mr. Pearson (number X); Janvier's Orrery (number VI); and a Section of the improved ORRERY for mean motions with dates ranging from 1808-17 and framed as two pairs, a group of three and a group of four within blue mounts and glazed frames, each image approximately 20 by 26cm (8 by 10.25 inches) to mount; the group of four with external frame measurements 41 by 135cm (16 by 53 inches).