Public domain in the United States

The files under this identifier are copies of works that are in the public domain in the United States: works
first published before 1931, United States patents, and official documents excluded from copyright (each
source's basis is recorded in the rights.yaml of its folder). No licence is needed to use them there.

Outside the United States a work may remain in copyright, for example for the life of its author plus 70 years;
whoever uses these files elsewhere checks the law that applies to them. The SCALE contributors claim no
copyright in these files and give no warranty about their status.
