Letter from H J H [Henry John Horstman] Fenton, 19 Brookside, Cambridge, to [Joseph] Larmor Fenton thinks it advisable that Larmor should see the corrected proof. He is unhappy at one particular phrase: students will think that 'heat developed' necessarily means 'heat evolved' and he hopes Larmor will allow some modification. Most recent works in physical chemistry relay [Jacobus Hendricus] van t'Hoff's equation with a minus sign, which puzzles students and Fenton had hoped to give a simple reason for this. [Walther Hermann] Nernst's methods may be mathematically unsound, but his books are used by all chemistry students. He notes the difficulty of the 'offending' passage on 'vaporisation at constant volume', a well-known puzzle to elementary students of chemistry. 11 May 1909