http://www.gutenberg.org/ebooks/author/57369.opds 2024-11-08T21:14:43Z Books by Hopkins, Arthur John (sorted by popularity) Free eBooks since 1971. Project Gutenberg https://www.gutenberg.org webmaster@gutenberg.org https://www.gutenberg.org/gutenberg/favicon.ico 25 1 2024-11-08T21:14:43Z https://sendtokindle.compellingsciencefiction.com/ebooks/74154.opds The reaction between manganese dioxide and potassium permanganate Arthur John Hopkins