An account of the glacieres or ice Alps in Savoy, in two letters, one from an English gentleman to his friend at Geneva; the other from Peter Martel, engineer, to the said English gntleman [sic]... As laid before the Royal Society.Martel, Pierre, 1718-Windham, William, 1717-17611744The first letter is by William Windham.Translated from the French.text