File:PSM V16 D025 Early vacuum tube experiments.jpg

From Wikisource
Jump to navigation Jump to search

Original file(1,115 × 713 pixels, file size: 127 KB, MIME type: image/jpeg)

Description Early vacuum tube experiments
Date between 1879 and 1880
date QS:P,+1850-00-00T00:00:00Z/7,P1319,+1879-00-00T00:00:00Z/9,P1326,+1880-00-00T00:00:00Z/9
Source Popular Science Monthly Volume 16
Author Unknown authorUnknown author
Permission
(Reusing this file)
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 70 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.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current04:15, 14 August 2010Thumbnail for version as of 04:15, 14 August 20101,115 × 713 (127 KB)Ineuw{{Information |Description = Early vacuum tube experiments |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_16.djvu/25 |Date = 1879-1880 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Category:Popular

Metadata