"Every perception is to some degree an act of creation, and every act of memory is to some degree an act of imagination."
-- Gerald Edelman, Second Nature: Brain Science and Human Knowledge
1 Of colours3 Of coloursOf coloursThe Newton Project Knowledge Graph2020-10-08Journal
1 Note that slowly moved rays are refracted more then swift ones
2dly If adbc be shaddow & cdsr white then the slowly moved rays coming from cdqp will be refracted as if they had come from eodc soe that the slowly moved rays being seperated from the swift ones by refraction, there ariset 2 kinds of colours viz: from the slow ones blew, sky colour, & purples. from the swift ones red, yellow & from them which are neither moved very swift nor slow ariseth greene but from the slow & swiftly moved rays mingled ariseth white grey & black. whence it is that cdqp will not appeare red unless qsrp be darke because as many slow rays as come from cdqp & are refracted as if they came from eodc, soe many slow rays come from qsrp & are refracted as if they came from dqpc unless qsrp be darker than dqpc