There had been one or two inclusions of inferential matter in the guise of description, but that was to be looked for and discounted.
"Murder in the Gunroom"
Henry Beam Piper
It is clear that the ore-bearing solutions in these cavities, before the crystallization of the heavy mineral inclusions, held dissolved not only much larger quantities of mineral substances than can be taken up by water at ordinary temperatures, but also a substance like ferric oxide which is entirely insoluble under ordinary cool conditions.
"The Economic Aspect of Geology"
C. K. Leith
Often we find that every one of the inclusions in the mica-that is, every one of the earlier formed substances-contain radioactive elements, as indicated by the presence of darkened borders.
"The Birth-Time of the World and Other Scientific Essays"
J. (John) Joly