Travels of Volcanic Dust
On the 2nd of September, 1845, a quantity of volcanic dust fell in the Orkney Islands, which was supposed to have originated in an eruption of Hecla in Iceland. It was subsequently ascertained that an eruption of Hecla took place on the morning of the above-named day, so as to leave no doubt of the justness of the conclusion. The dust had thus travelled about 600 miles!