Image:Pressey Testing Machine 2.jpg

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Interior of Pressey Testing Machine showing punchcard answer key.

Patent dates 1928 and 1930.

Exterior view also available.

Photograph by User:Gomer Bolstrood, September 7, 2006.

Released to the public domain.

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Public domain I, the copyright holder of this work, hereby release it into the public domain. This applies worldwide.

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File history

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Date/TimeDimensionsUserComment
current20:10, 9 September 20061,692×1,405 (1,010 KB)Gomer Bolstrood (Talk | contribs) (Interior of Pressey Testing Machine showing punchcard answer key. Manufactured circa 1930. Photograph by User:Gomer Bolstrood, September 7, 2006. Released to the public domain.)

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Metadata

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Camera manufacturer SONY
Camera model CYBERSHOT
Exposure time 1/40 sec (0.025)
F-number f/3.2
Date and time of data generation 15:03, 7 September 2006
Lens focal length 9.7 mm
Orientation Normal
Horizontal resolution 72 dpi
Vertical resolution 72 dpi
Software used QuickTime 7.1.2
File change date and time 14:59, 9 September 2006
Y and C positioning 2
Exposure Program Normal program
ISO speed rating 100
Exif version 2.2
Date and time of digitizing 15:03, 7 September 2006
Image compression mode 2
Exposure bias 0
Maximum land aperture 2.0625
Metering mode Spot
Light source Unknown
Flash 1
Color space sRGB