I have put in a fair amount of searching for this but have come up empty. I specifically remember the story printed from my childhood like 30-40 years ago, but I wanted to see if there's any source transcribed on the internet.
The printed account states that (I thought it was James Watt) was trying to figure out how (at that time) to make perfectly round ball bearings. He had a dream supposedly of an iron woman (no relation to Iron Maiden) crying metal tears and it was raining or some such similar detail.
Watt or whatever inventor then dropped molten iron of a specific quantity into a high vertical tank of water, and the resulting bearings came out perfectly or near perfectly round at the bottom.
Can anyone corroborate any portion of this? And give a reference? Thanks!
--- EDIT ---
I have found a book online, but it provides no further reference.
Here is another reference, but it states that he was walking in the rain but it was raining iron.