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Summary
DescriptionUnhappiness is usually due to ignorance of nature's laws.PNG
English: "Unhappiness is usually due to ignorance of nature's laws". Illustration of an early 20th century manual of 'social hygiene'.
Date
Source
The file was scanned in from a reprint of a book called Safe Counsel, or Practical Eugenics, a public domain book from 1928 by B. G. Jefferis and J. L. Nichols. Reprint was from "Intext Press", which reissues public domain books, and the reprint is ISBN0-88444-010-9.
Author
J. L. Nichols
Licensing
Public domainPublic domainfalsefalse
This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
The author died in 1955, so 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 60 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. Note that this work might not be in the public domain in countries that do not apply the rule of the shorter term and have copyright terms longer than life of the author plus 60 years. In particular, Mexico is 100 years, Jamaica is 95 years, Colombia is 80 years, Guatemala and Samoa are 75 years, and Switzerland and the United States are 70 years.
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