Microbe hunters, by Paul de Kruif 77842 [Author: Paul de Kruif] [Link: https://www.gutenberg.org/ebooks/77842] note: link will be active within two hours of posting. Thanks to Dori Allard, Tim Lindell and 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