In 1857, the earliest known illustration of a vertical biunial magic lantern, probably provided by E.G. Wood, appeared in the Horne & Thornthwaite catalogue.[1] Biunial lanterns, with two projecting optical sets in one apparatus, were produced to more easily project dissolving views.[2]
^"Gossip about ghosts". Slide Readings Library. The Magic Lantern Society. Archived from the original on 28 July 2011. Retrieved 26 February 2011.
^Page 35, Paranormal Media: Audiences, Spirits and Magic in Popular Culture, Author: Annette Hill, Publisher: Routledge, 2010, ISBN9781136863189, ...One public lecture titled 'Gossip about Ghost' by former chemist George Tweedie claimed 'spook hunting has recently become as fashionable as Slumming'...
^Page 220, The Chemical News and Journal of Industrial Science; with which is Incorporated the "Chemical Gazette.": A Journal of Practical Chemistry in All Its Applications to Pharmacy, Arts and Manufactures, Volume 37, Contributor: William Crookes, Publisher:Chemical news office, 1878, ...A process for coating iron with magnetic oxide by the action of heated air. By George R. Tweedie...