Extract of a Letter from Mons. Bonnet, F. R. S. to Mr. Trembley, F.R.S. Dated at Geneva, 30 January 1756, concerning the Earthquake on the 14th of November, 1755, in Valais in Swisserland. Translated from the French

bly owing to the great eruption, which happened to the mountain Hecla in Iceland, in October. I am, &c. Edinburgh, Feb. 10, 1756. Signed Robert Whytt. LXVIII. Extract of a Letter from Mons. Bonnet, F.R.S. to Mr. Trembley, F.R.S. dated at Geneva, 30 January 1756, concerning the Earthquake on the 14th of November, 1755, in Valais in Switzerland. Translated from the French. Read Feb. 19, 1756. VALAIS is thought to have been more shaken by the earthquake than our city and its neighbourhood. I procured a letter to be written to Brigue for a particular account of it. The following is an extract of the answer of a merchant of that town, to whom the letter was addressed. I should have been glad to have had some information concerning Brigue itself, which is said to have suffered considerably; but you will find, that this merchant says not a word of it. I shall make a fresh inquiry. Brigue, January 26, 1756: THE earthquake felt here, happened on the 14th of November, at three in the afternoon. It proceeded from the North, and lasted a minute. The earth opened on the mountain; and the open- ing was large enough to thrust one's hand in, and no bottom can be found. In another part of the mountain the earthquake opened a spring sufficient to turn two mills. It continues to run near the Rhone. It is remarkable, that before the earthquake there was no source of water in that place. The earth has been opened in another place. The opening is round, and no bottom can be discovered. The earth continues to shake almost every day, but these shocks are much gentler than the first. People here are under extreme apprehensions. Most of the inhabitants are retired into the mountains, where they lodge in wooden houses, which are safer than those in the city. LXIX. Extract of a Letter from Mons. Allemond, Professor of Natural Philosophy at Leyden, and F. R. S. to Mr. Trembley, F. R. S. Translated from the French. Leyden, Jan. 27, 1756. Read Feb. 19, 1756. On the night between the 26th and 27th of the last month of December, 1755, between eleven o'clock and midnight, there was a considerable earthquake on the frontiers of this country. It was felt at Liege, Maestricht, Nimèguen, Arnheim, and, according to some accounts, at Breda. There were three different shocks, the last of which happened at about four in the morning,