Rigby, Quicksilver & Bullet Alloys

[Frank Savage]

Wondering abóut this since first moment I heard about it. The side notice of the sho book is namely worthy.
The only I could ever come up with is, that the mercury made an amalgam with all the legures, as well as helping them to disperge much better throughout the alloy. Result-better uniformity and smaller crystaline structure as to my state of knowledge shall result.