The reaction between manganese dioxide and potassium permanganate, by 74154 Arthur John Hopkins [Author: Arthur John Hopkins] [Link: https://www.gutenberg.org/ebooks/74154] note: link will be active within two hours of posting. Thanks to The Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) Regards, Al