First published in 1826, at a time when the earth sciences were in a state of confusion and controversy, this pioneering study of volcanic action by Charles Daubeny (1795-1867) was significant in promoting the scientific method and the science of geology, at the same time establishing the author's international reputation. Having studied medicine, Daubeny increasingly turned his attention to chemistry, volcanos and earthquakes. Elected a fellow of the Royal Society, he also sought to elevate the status of science in Britain. He presents evidence here, gathered from his travels across Europe, in a methodical fashion, developing contemporary ideas regarding the processes at work beneath the surface of the earth. This reissued first edition provides an opportunity to examine Daubeny's reasoning prior to the revisions of the 1848 edition (also reissued in the Cambridge Library Collection), which was updated to take account of the work of Charles Darwin.