# "Heinrich Wilhelm Brandes" returned 12 hits

**Heinrich**Lambert's color pyramid, from, Tobias Mayer's colour pyramid, from

1

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

2

Experiments paving the way to the development of photography: Images obtained by action of light on a mixture of chalk, nitric acid, and silver salts

Mediaitems:
Schultze portrait, Schulze biographical blurb

Category:
Technology

3

Experiments paving the way to the development of photography: Images obtained by action of light on a mixture of chalk, nitric acid, and silver salts

Mediaitems:
Schultze portrait, Schulze biographical blurb

Category:
Technology

4

Diagrams developed to represent color systems. In 1758, Mayer developed a system of constructing and naming many of the possible colours. Lambert extended this with a 3D pyramid indicating "depth'' (saturation).

Mediaitems:
Moses Harris' prismatic colour mixture system, from, Johann **Heinrich** Lambert's color pyramid, from, Tobias Mayer's colour pyramid, from

Category:
Other

5

Curve-fitting and interpolation from empirical data points

Mediaitems:
Lambert biography, Lambert portrait

Category:
Other

6

Theory of measurement error as deviations from regular graphed line. (Lambert made the observation that "a diagram does incomparably better service here than a table.''cite[p. 204]{Tilling:1975}

Category:
Statistics & Graphics

7

Repeated systematic application of graphical analysis (line graphs applied to empirical measurements)

Mediaitem:
Graph of evaporation of water vs. time

Category:
Statistics & Graphics

8

Graphical analysis of periodic variation (in soil temperature), and the first semi-graphic display combining tabular and graphical formats

Mediaitems:
Lambert graphical table of temperatures, Lambert graph of solar warming vs. lattitude

Category:
Statistics & Graphics

9

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

10

Superimposed squares to compare areas (of European states)

Mediaitem:
Crome's 1820 Verhaeltness Karte

Category:
Statistics & Graphics

11

Physical atlas of the distribution of plants, animals, climate, etc., one of the most extensive and detailed thematic atlases; most of the maps contained tables, graphs, pictorial profiles of distributions over altitude, and other visual accompanyments

Mediaitems:
Charts showing temperature throughout the world, World map showing the tradewinds, Full colour "ideal'' geologic cross-section, Berghaus map icon, Berghaus biography, Berghaus map, high-res

Category:
Cartography

12

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