00:00 Introduction from Pratt
01:30 Nilsson begins speaking
02:30 Discussion of the question of a tree falling in the forest with no one to hear it
04:30 Discussion of the presence of colour if no one observes it
06:00 Discussion of the importance of colour to human biology
07:00 Discussion of infrared pictures of space
08:30 Discussion of colouring infrared pictures
09:30 Discussion of how the mind assigns colour
11:00 Discussion of the history of colour theories
14:00 Discussion of research at the University of Pennsylvania on fibres in the optic nerve
16:00 Discussion of other studies relating to the production of colour in the eye
18:00 Discussion of studies on colour receptors in monkeys
21:00 Discussion on the effects of flickering light on the perception of colour
23:00 Discussion of utilising a monochromator to study colour perception
27:30 Discussion of techniques developed to study colour; study on memory
29:00 Discussion of findings on memory and colour perception
30:00 Discussion of light receptors in the eyes, signals in the optic nerve
33:30 Discussion of monochromatic light
35:00 Discussion of the methodology of Nilsson's study
36:00 Discussion of time as a controlled variable in the study
37:00 Discussion of the results from Nilsson's study
40:30 Discussion of systems for identifying and specifying colour
43:30 Beginning of question period; inaudible question
44:00 Answer regarding memory for colour
49:30 Question regarding graphs representing wavelength
50:30 Question regarding colour blind people's perception of colour
52:00 Question regarding green receptors in the eye
55:00 Question regarding colour as a human invention
59:30 End of seminar
