3 8 c m
40cm
actual image size: 32cm x 30cm
Description
Pen and ink sketch of Sir James Hall (1761-1832), 4th Baronet of Dunglas. Hall discovered that by heating calcium carbonate under presure a rock substance similar to marble is formed. His work on the creation of rocks also proved that igneous rocks in Scotland had been produced under heat.
Image Details
Image Ref.
10301790
© Science Museum / Science & Society Picture Library