These scholars included engineers and artists, members of the Commission des Sciences et des Arts, the geologist Dolomieu, Henri-Joseph Redouté, the mathematician Gaspard Monge (a founding member of the École polytechnique), the chemist Claude Louis Berthollet, Vivant Denon, the mathematician Jean-Joseph Fourier (who did some of the empirical work upon which his "analytical theory of heat" was founded in Egypt), the physicist Étienne Malus, the naturalist Étienne Geoffroy Saint-Hilaire, the botanist Alire Raffeneau-Delile, and the engineer Nicolas-Jacques Conté of the Conservatoire national des arts et métiers.