XXV. On the variation of the temperature of boiling water

Abstract

HE heat of boiling water having for fome years been uled as one of the terms for graduating the fcale ot thermometers; together with the particular attention the Society has lately given (vide the Report of the Com­ mittee, Phil. Tranf. vol. lxvii.̂ to this branch of inquiry, and I may add the fingular fuccefs with which this age and nation has introduced a mathematical precifion, hi­ therto unheai d of, into the conftru£iion of philofophical mftruments, will render it unneceffary for me to fay more in refpeft of the following experiments, than Am­ ply to lay them before the Royal Society. That the heat of boiling water was variable, accord­ ing to the preffure of the atmofphere, feems to have been known to Fahrenheit as early as the year 17 24^.