More Scientists Do Science in Space (Ed Reads Sci-fi, vol. XI)
Author: first_name: Charles V.
last_name: de Vet
first_name: Raymond Fisher
last_name: Jones
first_name: Damon Francis
last_name: Knight
first_name: Alan E.
last_name: Nourse
first_name: Edward
last_name: Peattie
first_name: James H.
last_name: Schmitz
first_name: George O.
last_name: Smith
first_name: Albert R.
last_name: Teichner
first_name: Robert Moore
last_name: Williams
Language: English

‘The Great Gray Plague’ by Raymond F. Jones
https://www.gutenberg.org/cache/epub/28118/pg28118-images.html
There is no enemy so hard to fight as a dull gray fog. It's not solid enough to beat, too indefinite to kill, and too omnipresent to escape. 

‘The World Mover’ by George O. Smith
https://www.gutenberg.org/cache/epub/70824/pg70824-images.html
 George O. Smith collided worlds of the multiverse in this classic tale. 

‘The Avenger’ by Stuart Fleming
https://gutenberg.org/cache/epub/6