The Newberry makes its collections available for any lawful purpose, commercial or non-commercial, without licensing or permission fees to the library, subject to the following terms and conditions: https://www.newberry.org/rights-and-reproductions
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 (70 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.