Early history of the Heat Theorem

Early History of the Heat Theorem.—I have already been at some pains, in the first chapter, to describe the evolution of the new Heat Theorem historically, i.e. indicating those papers to which I owed important suggestions in my long preparatory work. 

I may here refer particularly once more to the well-known and excellent text-book of Haber, Thermodynamik tech-nischer Gasreaktionen (1905), which, however, did not appear until the essential part of my early work was concluded. In this book particular emphasis is laid on the importance of the integration constants in gaseous equilibria the nature of these our Heat Theorem then explained. 

I have intentionally omitted to mention a paper by Th. W. Richards, because I cannot admit that the thermodynamics in it had any influence on my deliberations owing to its vagueness and incorrectness van t Hoff remarks, however, that he was prompted by the above-mentioned publication of Richards to his work, with which I have dealt on page 9, which, though not unexceptionable in principle, was yet prolific in suggestions. 

I thought that no one reading these lines carefully could mistake my meaning, namely, that, in spite of the many suggestive ideas of Richards paper, either his or my thermodynamical theorems must be wrong, for I emphasized the partial character of the qualitative, and the absence of quantitative, agreement thermodynamics is, of course, specially distinguished by its definite and precise conclusions. 

In order to answer the question of the relation between maximum work A and heat evolution U, Richards dispenses 

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