Quaternions came from Hamilton after his really good work had been done, and though beautifully ingenious, have been an unmixed evil to those who have touched them in any way.
Lord KelvinThere is nothing new to be discovered in physics now. All that remains is more and more precise measurement.
Lord Kelvin[Referring to Fourier's mathematical theory of the conduction of heat] ... Fourier's great mathematical poem.
Lord Kelvin