In the histories of science, technology and aviation Christiaan Huygens has been unjustly neglected. Documents in the corpus of his works show a life-long interest in the problem of human flight together with some considerable anticipations of, and contributions to, its solution. He was among the first, if not the first, in perceiving the potential of the heavier-than-air approach. He clearly recognized the need for a powerful, mechanical motive source. He stated the first laws of aerodynamics and conceived the modern (...) propeller for propulsion. He was the first to conceive of the aeroplane. His approach to the problem of flying was both global and scientific. (shrink)

Contrary to what has been asserted or implied by Mach and more recent writers, the law of illumination and the study of photometry were not ignored in the years between Kepler's first enunciation of the former in 1609 and Bouguer's Essai on the latter in 1729. The law of illumination was in fact denied in 1613 by Aguilonius. It was probably rediscovered independently and certainly reformulated in more modern terms by Mersenne and Castelli in 1634, and by Boulliau in 1638. (...) It was again formulated and this time demonstrated empirically by Montanari no later than 1676, and possibly as early as 1634 by Castelli. Although neither the law nor photometry were major concerns before Bouguer, they were not completely neglected either. (shrink)

(1981). Benedetto Castelli's Discourse on the loadstone (1639–1640): the origin of the notion of elementary magnets similarly aligned. Annals of Science: Vol. 38, No. 2, pp. 125-140.