From: Ian Russell <ian@INTERACTIVES.CO.UK> Subject: Re: Pepper's Ghost Illusion To: ISEN-ASTC-L@HOME.EASE.LSOFT.COM

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Apparently this Victorian theatrical illusion was invented by John Henry Pepper, a professor of chemistry at the Royal Polytechnic in London.

My source on this is a book called "Making scientific toys" by C. Ritchie, published in 1978.

In it there is an old line drawing, showing a department-store-sized sheet of glass leaning out towards the audience at 45 degrees, between them and the actors on the stage. The drawing shows a second sheet of glass parallel to it and below it, down in the orchestra pit, forming a periscope. Two men are crouching between the lower glass and the front panel of the orchestra pit, controlling a spotlamp of some kind (not electrical?) by shining it back through the lower sheet of glass towards the "ghost" actor who is apparently directly under the stage beneath the other actors.

Ian Russell Interactive Science Ltd http://www.interactives.co.uk ian@interactives.co.uk

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SuperScienceSaturday: PeppersGhost (last edited 2010-01-21 02:50:55 by localhost)