We find that if the series of excitations of the muscle be prolonged beyond the short stage of initial improvement, the contractions, after being well maintained for a time, later decline in force and speed, and ultimately dwindle even to vanishing point.
The second section involves learning about the vibrational excitations of the crystal lattice - phonons.
coherent excitations The energy efficiency of living systems can be adequately accounted for by the thermodynamic considerations I have outlined so far.
massless relativistic string with no transverse excitations.
pressure, heat and colour, there must be other qualitative different excitations of different nerve-fibres, by means of which, as non-local signs of localities, the soul constructs in itself an image of extended space containing different places.