Photomicrograph_of_annealed_and_quenched_steel,_from_1911_Britannica_plates_11_and_14.jpg
No higher resolution available.
Summary
| Description |
English:
Photomicrographs of steel. The top photo shows annealed steel, while the bottom shows quenched steel.
|
| Date | |
| Source |
=
Encyclopædia Britannica Eleventh Edition
Vol. 1, Plate between pp. 704 and 705, Fig. 14. Files retrieved from Wikipedia,
here
and
here
then combined into a split-picture. Photos are pre-1911
|
| Author | Osmond and Cartaud. |
Licensing
|
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.
|
|
|
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.
|