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File:Two-lense pigeon camera sketch from ILA book (cropped).png

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Summary

Description
English: Sectional view and pneumatic system of Julius Neubronner's patented pigeon camera with two lenses.
Date or earlier
Source Richard Wachsmuth: Denkschrift der Ersten Internationalen Luftschiffahrts-Ausstellung (Ila) zu Frankfurt a.M. 1909. Appeared 1910.
Author Julius Neubronner (1852–1932)
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Public domain

This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 75 years or fewer.

You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.
 Note that a few countries have copyright terms longer than 75 years: Mexico has 100 years, Jamaica has 95 years, and Colombia has 80 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

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Date/TimeThumbnailDimensionsUserComment
current07:42, 2 April 2011Thumbnail for version as of 07:42, 2 April 2011502 × 477 (53 KB)Hans Adler{{Information |Description ={{en|1=Sectional view and pneumatic system of Julius Neubronner's patented pigeon camera with two lenses.}} |Source =Richard Wachsmuth: ''Denkschrift der Ersten Internationalen Luftschiffahrts-Ausstellung (Ila) zu Fr

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