George Sinclair (Sinclar) (c. 1630–1696) was a Scottish mathematician, engineer and demonologist. The first Professor of Mathematics at the University of Glasgow, he is known for Satan's Invisible World Discovered, (c. 1685), a work on witchcraft, ghosts and other supernatural phenomena. He wrote in all three areas of his interests, including an account of the "Glenluce Devil", a poltergeist case from c. 1654, in a 1672 book mainly on hydrostatics but also a pioneering study of geological structures through his experience in coal mines. (From Wikipedia)
More about George Sinclair: Associated author:Books by George Sinclair:
![[Info]](https://onlinebooks.library.upenn.edu/info.gif)
Sinclair, George, -1696: Satan's Invisible World Discovered (Edinburgh: T. G. Stevenson, 1871), ed. by Thomas George Stevenson (page images at HathiTrust)
Additional books by George Sinclair in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Sinclair, George, -1696: The hydrostaticks, or, The weight, force, and pressure of fluid bodies, made evident by physical, and sensible experiments together vvith some miscellany observations, the last whereof is a short history of coal, and of all the common, and proper accidents thereof, a subject never treated of before (Printed by George Swintoun, James Glen, and Thomas Brown, 1672) (page images at HathiTrust)- Sinclair, George, -1696: The hydrostaticks, or, The weight, force, and pressure of fluid bodies, made evident by physical, and sensible experiments together vvith some miscellany observations, the last whereof is a short history of coal, and of all the common, and proper accidents thereof, a subject never treated of before / by G.S. (Edinburgh : Printed by George Swintoun, James Glen, and Thomas Brown, 1672) (HTML at EEBO TCP)
- Sinclair, George, -1696: Natural philosophy improven by new experiments touching the mercurial weather-glass, the hygroscope, eclipsis, conjunctions of Saturn and Jupiter, by new experiments, touching the pressure of fluids, the diving-bell, and all the curiosities thereof : to which is added some new observations, and experiments, lately made of several kinds : together with a true relation of an evil spirit, which troubled a mans family for many days : lastly, there is a large discourse anent coal, coal-sinks, dipps, risings, and streeks of coal, levels running of mines, gaes, dykes, damps, and wild-fire / by G.S. (Edinburgh : ... are to be sold by Gideon Shaw ..., 1683) (HTML at EEBO TCP)
- Sinclair, George, -1696: The principles of astronomy and navigation, or, A clear, short, yet full explanation of all circles of the celestial and terrestrial globes and of their uses : being the whole doctrine of the sphere and hypotheses to the phenomena of the primum mobile : to which is added a discovery of the secrets of nature which are found in the mercurial-weather-glass &c. : as also a new proposal for buoying of a ship of any burden from the bottom of the sea / by George Sinclair. (Edinburgh : Printed by the heir of Andrew Anderson, 1688) (HTML at EEBO TCP)
- Sinclair, George, -1696: The register of the Synod of Galloway : from October 1664 to April 1671. (Kirkcudbright : Printed and published by J. Nicholson, 1856., 1856), also by Church of Scotland. Synod of Galloway and J. Nicholson (page images at HathiTrust)
- Sinclair, George, -1696: Satan's invisible world discovered, or, A choice collection of modern relations proving evidently against the saducees and atheists of this present age, that there are devils, spirits, witches, and apparitions, from authentick records, attestations of famous witnesses and undoubted verity : to all which is added, that marvellous history of Major Weir, and his sister : with two relations of apparitions at Edinburgh / by Georg Sinclar ... (Edinburgh : Printed by John Reid, 1685) (HTML at EEBO TCP)
- Sinclair, George, -1696: Truths victory over error, or, An abridgement of the chief controversies in religion which since the apostles days to this time, have been, and are in agitation, between those of the Orthodox faith, and all adversaries whatsoever, a list of whose names are set down after the epistle to the reader : wherein, by going through all the chapters of The confession of faith, one by one, and propounding out of them, by way of question, all the controverted assertions, and answering by yes, or no, there is a clear confirmation of the truth, and an evident confutation of what tenets and opinions, are maintain'd by the adversaries : a treatise, most useful for all persons, who desire to be instructed in the true Protestant religion, who would shun in these last days, and perillous times, the infection of errors and heresies, and all dangerous tenets and opinions, contrary to the word of God. (Edinburgh : Printed by John Reid, 1684), also by David Dickson (HTML at EEBO TCP)
Find more by George Sinclair at your library, or elsewhere.