A philosophical discourse upon earthquakes : their causes and consequences; comprehending an explanation of the nature of subterraneous vapours, their amazing force, and the manner in which they operate; the Sentiments on this Head of the most learned Philosophers ancient and modern; the different Kinds of Earthquakes, distinguished by their Effects; and a copious Collection of authentic Relations digested under those Titles. To which is prefixed, a preliminary dissertation, in which is attempted a rational explanation of the rise, progress, and extent of the late dreadful earthquake, so sensibly felt through great Part of Europe, on Saturday, November 1, 1755