Assigning colours to the notes in a musical octave
"Light is a part of the electromagnetic spectrum, higher in frequency than radio waves, but below X-rays. Wavelengths we can see are between approximately 380nm and 780nm. Curiously, the spectrum of visible light, between ultraviolet and infrared, is almost exactly an octave, with the visible edge of ultraviolet having double the frequency (and half the wavelength) of the visible edge of infrared. … "
I believe that the social ideas of anarchism: autonomous groups, spontaneous order, workers’ control, the federative principle, add up to a coherent theory of social organisation which is a valid and realistic alternative to the authoritarian, hierarchical and institutional social philosophy which we see in application all around us. Man will be compelled, Kropotkin declared, “to find new forms of organisation for the social functions which the State fulfils through the bureaucracy” and he insisted that ”as long as this is not done nothing will be done.” I think we have discovered what these new forms of organisation should be. We have now to make the opportunities for putting them into practice.