This work is in the public domain in the United States
because it was legally published
within the United States (or the United Nations Headquarters in New York subject to Section 7 of the United States Headquarters Agreement
) between 1923 and 1977 (inclusive) without a copyright notice.
The author died in 1940, so this work is also in the public domain in countries and areas where the copyright term is the author's life plus 70 years or less. This work may also be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.