Principles of geology : being an attempt to explain the former changes of the earth's surface, by reference to causes now in operation
Principles of Geology is a scientific treatise by geologist Charles Lyell, published in London by John Murray in 1830, with engravings printed by William Clowes for readers of natural science. Its pictures are small engraved views of landforms and monuments, including a crater-like chasm, a distant volcanic island profile, a sketch map, and two obelisks, showing how careful line engraving can record natural and architectural form for a designer's reference.
