Chapter

1 XV |      and when smelted with pit coal, is of superior quality
2 XV |      brought into contact with coal and silicium heated to a
3 XV |        adapted for burning pit coal, with a flat bottom upon
4 XV |        cast, so many pounds of coal were there to burn. Thus
5 XV |      there were 68,000 tons of coal which projected in the face
6 VI |   produced by 16,000 globes of coal, each equal in bulk to our
7 VI |        that of 4,000 masses of coal of an equal bulk.”~“And
8 VI |     combustion of a stratum of coal surrounding the sun to a
9 VII| Neither metals, saltpeter, nor coal can fail in the depths of