The Pulfrich Effect: Credits to Contributors

Drude 1902, p. 246: The Norrenberg Polariscope

This web site was designed and implemented by John Michael Williams, who prepared the initial specifications.

Alfred Lit at Carbondale, Illinois, ca. 1983
Alfred Lit
1914 - 2000
Professor Emeritus Alfred Lit, world authority on the Pulfrich Effect, approved the specifications, obtained author and publisher permissions, and arranged for SIU-C Psychology Department support without which the site would not have been possible.


The original idea for the site was conceived by R. W. D. Nickalls, who first suggested it in 1997. Visitors interested in a novel, rotating-target, Pulfrich apparatus for research or clinical use may wish to contact
Dr. R. W. D. Nickalls, dick@nickalls.org, Department of Anaesthesia, City Hospital, Nottingham, UK.

Special thanks are due to San Jose State University Serials Department, Clark Library, and to Lane Medical Library, Stanford University, for help in obtaining the documents posted at this web site.

Copyright on the historical decorative artwork has expired. The source for each reproduced image may be determined from its HTML "alt" tag:

Agricola, Georgius
.		 De Re Metallica. Basel: Froben (1st Latin ed.), 1556. 1912 English translation by H. C. Hoover & L. H. Hoover. Republished New York: Dover Publications, Inc., 1950.
Drude, Paul
.		 The Theory of Optics. 1902 English Edition translated by C. R. Mann & R. A. Milliken (Preface by A. A. Michelson). Republished New York: Dover Publications, Inc., 1959.
Galilei, Galileo

.		 Dialogues Concerning Two New Sciences. Leyden: Elzevirs, 1638. Translated into English by Henry Crew and Alfonso de Salvio, with English Introduction by Antonio Favaro. London: Macmillan & Co., 1914. Republished New York: Dover Publications, Inc., 1954.
Gray, Andrew
.		 Absolute Measurements in Electricity and Magnetism. London: Macmillan & Co., 1921. Republished New York: Dover Publications, Inc., 1967.
Loeb, Jacques
.		 Forced Movements, Tropisms, & Animal Conduct. Philadelphia: J. B. Lippincott Co., 1918. Republished New York: Dover Publications, Inc., 1973 (with new Introduction).
Newton, Isaac
.		 The Principia: Philosophiae Naturalis Principia Mathematica. Cambridge, 1726. 1848 English translation by Andrew Motte. Republished Amherst, New York: Prometheus Books, 1995.

NOTE: Some proper names following are trademarks of the firms named:
This web site's text documents were composed in Microsoft Word v. 7.0; images were scanned in Windows NT by a UMAX S-12 scanner.
The posted documents were collated and converted to PDF in Adobe Acrobat Exchange 3 and tested in Ghostgum GhostView 2.7; GIF animations were composed in Microsoft GIF Animator v. 1.0. All graphic work was done in Corel DRAW.

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The Pulfrich Effect, SIU-C. Last updated 2009-04-11