date QS:P,+1911-00-00T00:00:00Z/7,P1326,+1911-00-00T00:00:00Z/9
Source
1911 Encyclopædia Britannica, Vol. 1, Plate between pp. 704 and 705, Fig. 7
Author
Unknown authorUnknown author
Caption:
Fig. 7. — Gun steel, C.=0.30%. Top of ingot, forged
and annealed, magnified 29 diameters. Whites, ferrite;
blacks, carbide.
Public domainPublic domainfalsefalse
This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.
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