Weighing the World

At the start of the 18th century there were no maps, anywhere in the world. No one knew, with any certainty, the shape of the earth or what lay beneath its surface. Was it hollow or solid? Were the Andes the highest mountains on the Earth or was it the peak of Tenerife? Was the Earth a perfect sphere or slightly squashed as Sir Isaac Newton prophesized? In Weighing the World, master-surveyor and b...