Image:Stephen Hale - pneumatic trough.jpg

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[edit] Summary

Description

English natural philosopher Stephen Hales' pneumatic trough. A similar device was used by Joseph Priestley for the production of novel "airs", and for performing the "nitrous air test".
Source

Hale's 1727 work, as reproduced in: Joseph S. Fruton, Methods and Styles in the Development of Chemistry, Philadelphia: American Philosophical Society, 2002, p. 20.
Date

1727
Author

Stephen Hales
Permission
(Reusing this image)

see below

[edit] Licensing

Public domain This image (or other media file) is in the public domain because its copyright has expired.

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Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Côte d'Ivoire has a general copyright term of 99 years and Honduras has 75 years, but they do implement that rule of the shorter term.

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Date/TimeDimensionsUserComment
current15:22, 19 September 2007856×985 (201 KB)Ragesoss ({{Information |Description= English natural philosopher Stephen Hale's pneumatic trough. A similar device was used by Joseph Priestley for the production of novel "airs", and for performing the "nitrous air test". |Source= Hale's 1727 work, as reproduced)
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Metadata

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Camera manufacturer Canon
Camera model Canon EOS DIGITAL REBEL XTi
Exposure time 1/200 sec (0.005)
F-number f/4.5
Date and time of data generation 15:09, 19 September 2007
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File change date and time 15:09, 19 September 2007
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Date and time of digitizing 15:09, 19 September 2007
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Unique image ID 7875155a0386989c2de257375df45f5b