Electroencephalograph invented, to record electrical signals from the brain via galvanometers that measure electrical signals from electrodes on the scalp. EEGs were printed on multiple-pen, strip-chart recorders, with each channel showing the the amplitude from a given electrode.
Buble chart for HIV, Buble chart for the World, Hans Rosling, Gapminder home page
Statistics & Graphics
This web version is dedicated to Arthur H. Robinson (1915-2004), who inspired and encouraged our interest; to Antoine de Falguerolles, who initiated it, and to les Chevaliers des Album de Statistique Graphique, who supported it with interest, enthusiasm, and resources. In particular, Gilles Palsky, Antoine de Falguerolles, Antony Unwin and Ruddy Ostermann contributed important images and background information. This work is supported by the National Sciences and Engineering Research Council of Canada, Grant OGP0138748.
Citations: References to information or images obtained from this web site should be cited as follows:
Friendly, M. & Denis, D. J. (2001).
Milestones in the history of thematic cartography, statistical graphics, and data visualization.
Web document, http://www.datavis.ca/milestones/. Accessed: