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File:Leibnitzrechenmaschine.jpg

Summary

Description
Deutsch: Nachbau einer Rechenmaschine von 1700 von de:Gottfried Wilhelm Leibniz
English: The Staffelwalze, or Stepped Reckoner, a digital calculating machine invented by Gottfried Wilhelm Leibniz around 1672 and built around 1700, on display in the Technische Sammlungen museum in Dresden, Germany. It was the first known calculator that could perform all four arithmetic operations; addition, subtraction, multiplication and division. 67 cm (26 inches) long. The cover plate of the rear section is off to show the wheels of the 16 digit accumulator. Only two machines were made. The single surviving prototype is in the National Library of Lower Saxony (Niedersächsische Landesbibliothek) in Hannover; this is a contemporary replica.
Date
Source recorded by me in de:Technische Sammlungen der Stadt Dresden (with photo permission)
Author User:Kolossos
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( Reusing this file)

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Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.
Camera manufacturer SONY
Camera model DSC-P52
Exposure time 1/40 sec (0.025)
F-number f/3.8
ISO speed rating 160
Date and time of data generation 15:12, 5 July 2006
Lens focal length 6.3 mm
Orientation Normal
Horizontal resolution 72 dpi
Vertical resolution 72 dpi
File change date and time 15:12, 5 July 2006
Y and C positioning Co-sited
Exposure Program Normal program
Exif version 2.2
Date and time of digitizing 15:12, 5 July 2006
Image compression mode 4
Exposure bias 0
Maximum land aperture 3.875 APEX (f/3.83)
Metering mode Pattern
Light source Unknown
Flash Flash fired, strobe return light not detected, auto mode
Colour space sRGB
Custom image processing Normal process
Exposure mode Auto exposure
White balance Auto white balance
Scene capture type Standard

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