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A Letter from Father Abraham, to His Beloved Son

Dear Isaac, You frequently desire me to give you some Advice, in Writing. There is, perhaps, no other valuable Thing in the World, of which so great a Quantity is given, and so little taken. Men do not generally err in their Conduct so much through Ignorance of their Duty, as thro Inattention to their…

Cooling by Evaporation

To John Lining Dear Sir, London, June 17, 1758. In a former letter I mentioned the experiment for cooling bodies by evaporation, and that I had, by repeatedly wetting the thermometer with common spirits, brought the mercury down five or six degrees. Being lately at Cambridge, and mentioning this in conversation with Dr. Hadley, professor…

Strata of the Earth

To John Pringle SIR, Craven-street, Jan. 6, 1758. I return Mr. Mitchell‘s paper on the strata of the earth with thanks. The reading of it, and perusal of the draft that accompanies it, have reconciled me to those convulsions which all naturalists agree this globe has suffered. Had the different strata of clay, gravel, marble,…