Marci Von Kronland, Johannes Marcus

Marci Von Kronland, Johannes Marcus


(J. M. Marci z Kronlandu). Born June 13, 1595, in Lanskroun, Bohemia; died Dec. 30, 1667, in Prague. Czech scientist.

Marci studied philosophy and theology at the University of Olomouc and medicine at the University of Prague. In 1632 he became a professor at the University of Prague, and in 1662, rector of that institution. For his scientific works he received a title of nobility and the position of imperial physician-in-ordinary. He analyzed the collision of solid spheres and was the first to state the difference between elastic and inelastic collisions. Marci’s works in optics were his most significant: he gave an explanation of the rainbow and of the coloring of thin films, established the relation between the refraction and chromaticity of a ray, examined the phenomenon of diffraction, and actually applied the principle that was discovered later by C. Huygens and named after him. Marci’s works were largely unknown for a long time.


De proportione motus seu regula sphygmica. Prague, 1639.
Thaumantias: Liber de arcu coelesti deque colorum apparentium natura, ortu et causis. Prague, 1648.


Hoppe, E. “Marcus Marci de Kronland.” Archiv fur Geschichte der Mathematik, der Naturwissenschaften undder Technik, 1927, vol. 10, fasc. 3, pp. 282-90.
Marek, I. “Issledovaniia lana Mareka Martsi v oblasti fizicheskoi optiki.” Voprosy istorii estestvoznaniia i tekhniki, 1971, fasc. 1 (34), pp. 59-61.