Subject: What is the actual temperature profile of a bar heated at one end?

Descriptions of Fourier's experiment with conductive heating seem to indicate 
that temperature measurements along a bar heated at one end rise & fall like a 
sine wave. Is this the actual profile or are they just talking about Fourier's 
method of adding sine & cosine equations to analyze a discontinuous function? 
I myself have never witnessed a wave-like temperature profile.

Re: What is the actual temperature profile of a bar heated at one end?