Part I. Atom and void. The quiet citadel ; Things-in-themselves ; An impression of force ; The sceptical chymists

Part II. Mass and energy. A very interesting conclusion ; Incommensurable ; The fabric ; In the heart of darkness

Part III. Wave and particle. An act of desperation ; The wave equation ; The only mystery ; Mass bare and dressed

Part IV. Field and force. The symmetries of nature ; The Goddamn particle ; The Standard Model ; Mass without mass.