Complex sentence: The slug was first used in 1902 by Arthur Mason Worthington (1852--1916) in "Dynamics of Rotation" (OED), but it didn't see any significant use until decades later.
Split into simpler sentences: The slug was first used in 1902 by Arthur Mason Worthington (1852--1916) in "Dynamics of Rotation" (OED). But it didn't see any significant use until decades later.