Encloses newly-discovered proof that John Forbes Watson's wet bulb depression was not a clerical error.
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Encloses newly-discovered proof that John Forbes Watson's wet bulb depression was not a clerical error.
Plans date and time for first ascent of balloon experiment. WS's daughter has fallen in love with JH's son William.
Describes travels abroad and their educational value, news on balloon ascents, barometer corrections, Henri Regnault's hygrometer, invention of electric weaver and other new applications of electricity throughout Europe.
Interprets [John] Dalton's theory of the nonelasticity of gas particles, expressing its limitations, particularly in regard to a Mr. Paton's paper.
Before meeting of Balloon Committee, requests JH's opinion on value of renewing balloon ascents.
Urges renewal of high balloon ascents with periodic observations both to further knowledge of law of decrement of temperature and pressure and for 'ulterior investigations.'