File:PSM V64 D566 Cavern air ventilation of the room.png

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Original file (1,185 × 942 pixels, file size: 183 KB, MIME type: image/png)

Summary

Description
English: Cavern air ventilation of the room
Date between 1903 and 1904
date QS:P,+1903-00-00T00:00:00Z/8,P1319,+1903-00-00T00:00:00Z/9,P1326,+1904-00-00T00:00:00Z/9
Source Popular Science Monthly Volume 64
Author Unknown authorUnknown author

Licensing

Public domain
Public domain
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
United States
United States
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

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data size

186,910 byte

height

942 pixel

width

1,185 pixel

media type

image/png

checksum

18a85f31281dc0dcd25c72a0d813c24185dc39a2

determination method or standard: SHA-1

File history

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Date/TimeThumbnailDimensionsUserComment
current05:37, 18 September 2011Thumbnail for version as of 05:37, 18 September 20111,185 × 942 (183 KB)Ineuw
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