Yes. Four-part serial, starting in October 1939, in Astounding.
The properties of the Lensmen's Negasphere are something like antimatter, something like a black hole, and something like "negative mass" (attraction turns into repulsion). But it probably counts for the purposes of this discussion.
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The properties of the Lensmen's Negasphere are something like antimatter, something like a black hole, and something like "negative mass" (attraction turns into repulsion). But it probably counts for the purposes of this discussion.