So does the miner at first, when he has only to wrestle with the soil, sub-soil, and all that kind of thing.
It is well known that they may grow where the sub-soil is everlasting ice.
By the use of the sub-soil plow, they are rendered available.
Should it be free of stones, stumps, and other obstructions, the plough and sub-soil plough will be all-sufficient.
While I toyed ...