"The Devolutionist and the Emancipatrix" by Homer Eon Flint from my father's collection.  

1965 Ace Books #F-355, 191 pages.  Cover by Jerome Podwil.  A "First Book Publication" for Ace Books, these two stories were originally published in Argosy-All Story Weekly in July 1921 and September 1921.  This is good old-fashioned "Radium Age" science fiction!

This book is in very good condition with light wear, mainly on the edges of the cover.  Please see photos for more condition details.

This is one of the many comic books, pulp magazines, paperbacks, and hardcovers I have inherited from my father, who had been collecting from the mid-1940s in Maine until his death in the late 1990s in Los Angeles.  I combine orders to save on shipping!