magnifier and he's on record by the mid-80s.
As somebody who's gone decently deep on gravity research mid-century, I would actually entertain this.
In this theory, nuclear fuels were used mid-century to alter gravity.
In fact, the most prolific gravity related inventor mid-century was the aforementioned Thomas Townsend Brown. But people don't know that Townsend Brown was actually obsessed with time travel.