Maybe I can play the same game with the other known force, which was, at that time, known as the electromagnetic force -- we know of others today, but at that time that was the only other one people were thinking about.
Možda ja mogu napraviti isto s drugom poznatom silom, koja je u to vrijeme bila poznata kao elektromagnetska sila. Danas znamo i za druge, ali u ono doba to je bila jedina druga o kojoj su ljudi razmišljali.