Books Received | Published:

The Entropy Diagram and its Applications

Nature volume 60, pages 35 | Download Citation



RANKINE'S “Thermodynamic Function Phi;” (defined by t.dΦ=dH) is now called “Entropy Φ.” The state of a pound of stuff which has only fluid stress and strain is completely defined when we know the values of any two of p, v, t, E or Φ [during change of state the two must not be merely p and t] where E is the intrinsic energy and Φ is the entropy. When we say that E returns to its old value if we bring the stuff to the same state again, we state the first law of thermodynamics in its most general form. When we say that p returns to its old value, we state the second law of thermodynamics in its most general form.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.

About this article

Publication history




  1. Search for JOHN PERRY in:


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

Newsletter Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing