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((Ernest)) ((Florens)) ((Friedrich)) ((Chladni)) returned 5 hits

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1
1778 Geological map
Author: Johann Friedrich von Charpentier (1738-1805)
Geological map (distribution of soils, minerals)
Category: Cartography
2
1782 1st thematic map?
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)
Category: Cartography
3
1785 Superimposed squares
Author: August Friedrich Wilhelm Crome (1753-1833)
Superimposed squares to compare areas (of European states)
Category: Statistics & Graphics
4
1787 Vibration pattern
Author: Ernest Florens Friedrich Chladni (1756-1827)
Visualization of vibration patterns (by spreading a uniform layer of sand on a disk, and observing displacement when vibration is applied)
Category: Other
5
1809 Least squares method
Author: Johann Carl Friedrich Gauss (1777-1855)
Methods of determining an orbit from at least three observations; presentation of the least squares method
Category: Statistics & Graphics