THERMOMETRICAL NAVIGATION. BEING A SERIES OF EXPERIMENTS AND OBSERVATIONS TENDING TO PROVE THAT BY ASCERTAINING THE RELATIVE HEAT OF THE SEA-WATER FROM TIME TO TIME THE PASSAGE OF A SHIP THROUGH THE GULPH STREAM AND FROM DEEP WATER INTO SOUNDINGS MAY BE DISCOVERED IN TIME TO AVOID DANGER ALTHOUGH OWING TO TEMPESTUOUS WEATHER IT MAY BE IMPOSSIBLE TO HEAVE THE LEAD OR OBSERVE THE HEAVENLY BODIES. EXTRACTED FROM THE AMERICAN PHILOSOPHICAL TRANSACTIONS. VOL. 2 & 3. WITH ADDITIONS AND IMPROVEMENTS. "GOD HELPS THEM THAT HELP THEMSELVES." POOR RICHARD
179936167Philadelphia: Printed and Sold by R. Aitken 1799. xii 98 3 1 blank pp. lacking the folding map. Errata at the bottom of page 98. Disbound light wear Good.<br/><br/> "A scientific treatise advancing the idea that sandbanks could be discovered by using the thermometer. Benjamin Franklin's grand-nephew Jonathan Williams was the son of Jonathan Williams and Grace Harris Williams daughter of Benjamin Franklin's sister Anne. Williams along with his brother were sic sent to London in 1770 to complete their training and make contacts under Franklin's tutelage. Franklin was impressed by his diligence and the two remained close over the years. Williams lived abroad until his return to America with Franklin in 1785. In 1796 he became an associate judge in the court of common pleas and gained a reputation as a scientist. He worked with his uncle on some of his later experiments. He also contributed to the Transactions of the American Philosophical Society where he served at various times as secretary councillor and vice-president" Christie's description 2007 auction.<br/>Evans 36722. Rink 3893. ESTC W7573. Printed and Sold by R. Aitken unknown books
