"(Wilhelm) (Lexis)" returned 6 hits

Sort results by: date | relevance
Author: Wilhelm Schickard (1592-1635)
The first known adding machine, a mechanical calculator called the "Calculating Clock.'' It could add and subtract up to six-digit numbers, based on the movement of six dented wheels geared through a "mutilated" wheel which with every full turn allowed the wheel located at the right to rotate 1/10th of a full turn
Mediaitems: reproduction of Schickard's calculating clock, Schickard biography, History of mechanical calculators - Part 1
Category: Technology
Author: August Friedrich Wilhelm Crome (1753-1833)
Statistical map of production in Europe, possibly the first economic and thematic map (shows geographic distribution of 56 commodities produced in Europe)
Mediaitems: Crome portrait, Wikipedia bio (German)
Category: Cartography
Author: August Friedrich Wilhelm Crome (1753-1833)
Superimposed squares to compare areas (of European states)
Mediaitem: Crome's 1820 Verhaeltness Karte
Category: Statistics & Graphics
Authors: Heinrich Wilhelm Brandes (1777–1834)
The first weather map was invented by physicist Heinrich Wilhelm Brandes in 1816, based on data collected over several decades.
Mediaitem: The first weather map
Category: Cartography
Author: Wilhelm Lexis (1837-1914)
Lexis diagram, showing relations among age, calendar time, and life spans of individuals simultaneously (but the paternity of this diagram is in dispute cite{Vandeschrick:2001})
Mediaitems: Lexis portrait, Visualisation using Lexis pencils, Illustrated description of the Lexis diagram, The Lexis diagram, a misnomer, Lexis diagram
Category: Statistics & Graphics
Author: Niels Keiding (1944-)
Lexis pencil: display of multivariate data in the context of life-history
Mediaitems: Animated 3D lexis pencil, from Brian Francis, Bertin, lexis, and the graphical representation of event histories, Lexis pencil image
Category: Statistics & Graphics