Jean-Baptiste le Rond d'Alembert was a French mathematician, mechanician, physicist, philosopher, and music theorist. Until 1759 he was co-editor with Denis Diderot of the Encyclopédie. D'Alembert's formula for obtaining solutions to the wave equation is named after him. The wave equation is sometimes referred to as d'Alembert's equation.
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“Nothing is more incontestable than the existence of our sensations; …”
in the Discours préliminaire de l’Encyclopédie http://fr.wikisource.org/wiki/Discours_pr%C3%A9liminaire_de_l%E2%80%99Encyclop%C3%A9die. <br class="br">Context: Nothing is more incontestable than the existence of our sensations;...
