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The Mechanical Theory of Heat, by Rudolf Clausius, edited by Thomas Archer Hirst, 1867

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This book collects English translations of nine papers, published in journals by Clausius, between 1850 and 1865.  This collection of original papers should not be confused with a later book of the same title, also by Clausius, where he worked his original papers into a textbook.

Reading unfortunate Planck

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Planck submitted his doctoral dissertation in 1879, at the age of 21. According to Planck’s autobiography, his dissertation elaborated on Clausius's entropy and its role in distinguishing reversible and irreversible processes. His dissertation failed to interest his professors, Helmholtz and Kirchhoff among them. Planck subsequently, as a young academic, applied the principle of the increase of entropy to analyze phases and ideal-gas mixtures.

Masters of Thermodynamics

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One Internet, multiple worlds.  People have gone mobile, but iMechanica has not.  Although iMechanica is accessible from mobile phones, but it was not designed as such.  On the other hand, mobile social networks are good mostly for short forms.  A practical solution seems to be posting on iMechanica and linking the entries to social networks, such as twitter, wechat, and Facebook.  For example, The New Yorker has a strong presence on Facebook, as my sons and their friends would say.