Yet another invisibility story! So many invisibility stories.

So, in the list of stories we’ve looked at so far, we’ve seen invisible people, invisible monsters, invisible buildings, invisible cars, invisible dogs, and invisible spacecraft. But you now what we haven’t seen yet? Invisible robots!

Our invisible robots appear in Harl Vincent’s “Terrors Unseen,” which appeared in the March 1931 issue of Astounding Stories. It is not a particularly astounding story, but it does has invisible robots, so let’s take a look!