From Drebbels wiki
His (Drebbel's) fame and authority as a philosopher grew from the invention of what he called “living instruments [levendige Instrumenten]” which fused alchemy, mechanics, pneumatics, and physics. Drebbel’s simple, artisanal approach to what appeared to be immediate and pansophic knowledge enthralled many academic alchemists and Ramists in particular. They embraced his machine-based philosophy, including the use of “living instruments”, as a direct means to studying the working of the greater world machine.
Dr. V Keller, DREBBEL’S LIVING INSTRUMENTS, Hist. Sci., xlviii (2010)