7th January: Margarete, Ludwig’s second sister, marries a wealthy American, Jerome Stonborough (Waugh, p.20). Gustav Klimt is commissioned to paint her wedding portrait (Monk, p.9).

LW reads Schopenhauer’s book Die Welt als Wille und Vorstellung (The World as Will and Idea, first published in 1818).

Asked to specify his intended vocation, LW vacillates between physics and engineering (Spelt & McGuinness 2001, p.131).

(Also in 1905: Publication of Ludwig Boltzmann’s Populäre Schriften (including his 1894 essay ‘On Aeronautics’) (see Sterrett, pp.xxi, 42, 47, 72), Bertrand Russell’s ‘On Denoting’, and Ernst Mach’s Erkenntnis und Irrtum [Cognition and Error]).