1To John Adams from David Sewall, 22 February 1803 (Adams Papers)
I have been gratified with the perusal of Mr Williams’s Observations, on the temperature of Sea Water at differt depths. And the publication is the first of the kind I have seen, or heard of, and suppose the Thermr. may be very usefull to mariners, if properly attended unto. The Gulf Stream, I am of Opinion, Occasions the sudden transitions from Cold (very Cold) to temperate and Warm—in our...
2To John Adams from David Sewall, 6 January 1803 (Adams Papers)
I was considerably amused by a News paper publication some few Weeks since, Which Paper I have lost or mislaid.—It was a description of something that tended to the great and long desideration of ascertaining Longitude. A Gent. was said to have departed on a Voyage from Philadelphia for some Port on the Eastern Continent, and during the Voyage, told the precise Longitude the Vessell was in...