Remove the spaces from the following sentence: La Dioptrique is a work on optics and, although Descartes does not cite previous scientists for the ideas he puts forward, in fact there is little new. However his approach through experiment was an important contribution.
LaDioptriqueisaworkonopticsand,althoughDescartesdoesnotcitepreviousscientistsfortheideasheputsforward,infactthereislittlenew.Howeverhisapproachthroughexperimentwasanimportantcontribution.