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The universal system: or mechanical cause of all the appearances and movements of the visible heavens: shewing the true powers which move the Earth and planets in their central and annual rotations. With A Dissertation on comets, The Nature, Cause, Matter, and Use of their Tails, and the Reasons of their long Trajectories: likewise An attempt to prove what it is that moves the Sun round its Axis.
- Lacy, John, writer on astronomy.
- M,DCC,LXXIX. 
About this work
London : printed for J. Buckland, in Pater-Noster-Row, M,DCC,LXXIX. 
vi,33,p. ; 8⁰.
Electronic reproduction. Farmington Hills, Mich. : Thomson Gale, 2003. (Eighteenth century collections online). Available via the World Wide Web. Access limited by licensing agreements.