He also did important work in optics (1604, 1611), discovered two new regular polyhedra (1619), gave the first mathematical treatment of close packing of equal spheres (leading to an explanation of the shape of the cells of a honeycomb, 1611), gave the first proof of how logarithms worked (1624), and devised a method of finding the volumes of solids of revolution that (with hindsight!) can be seen as contributing to the development of calculus (1615, 1616).
Siya rin ay mahalaga sa trabaho sa optika (1604, 1611), natuklasan ng dalawang bagong regular na polyhedra (1619), ibinigay ang unang matematiko paggamot ng mga close packing ng pantay na spheres (humahantong sa isang paliwanag ng hugis ng cells ng isang pulot-pukyutan, 1611), Ibinigay ang unang patunay ng kung paano logarithms nagtrabaho (1624), at devised ng isang paraan ng paghahanap ng volume ng solids ng rebolusyon na (sa hindsight!) Ay makikita bilang ng kontribusyon sa pagbuo ng calculus (1615, 1616).