First published in HOUSE OF MYSTERY #84 , then reprinted in HOUSE OF MYSTERY #194 , now the 8-page "The Negative Man" is reprinted in SHOWCASE PRESENTS THE HOUSE OF MYSTERY #1, along with 538 other pages of comics from the first 21 issues of the series edited by Joe Orlando from 1968 to 1971.
In this story, two scientists build a miniature town to test their power transmission through radio waves device. A loose watch straps makes all the energy go through one of the men, creating a negative energy duplicate of him.
The negative being goes on a rampage, until the original scientist plans to sacrifice himself to destroy it. Fortunately for him, what he didn't know was the secret of the negative being which made it afraid of him.
I really like what I've read of the Kirby stories from DC in this period, and it looks really sharp in this book (except for the enlarged gutters they would put in reprints back in the early 1970s). That first panel in the scan is just really evocative and does a great job of capturing movement on a comic page.
Great book overall, too, maybe my favourite book in DC's new SHOWCASE PRESENTS line so far, thanks to the sheer variety of great artists from that era, with much better reproduction than the stories got the first time around.