Note 56 — Chapter VI · THE CARBONIFEROUS SYSTEM.
Reading edition
“Vast quantities:” let any reader go and turn over the non-bituminous shale lying on the waste heaps of every coalpit, and he will see that this is no exaggeration.
Reading edition
“Vast quantities:” let any reader go and turn over the non-bituminous shale lying on the waste heaps of every coalpit, and he will see that this is no exaggeration.