[Sapphires] of ten to fifteen rutties without a flaw are common, whereas a perfect ruby of that size is hardly ever seen.

What time the mighty moon was gathering light Love paced the thymy plots of Paradise, And all about him roll'd his lustrous eyes;

In North America the millstone grit, and a grey sandy and slaty rock beneath it, occur three times; and it is exceedingly difficult to distinguish these rocks in hand specimens, without the aid of organized remains. And remains are almost exclusively confined to the grey rocks. Common quarrymen, farmers, and foreign geologists, apply the names, greywracke and millstone, to all these rocks promiscuously; neither having observed their different relative positions.

In the previous sections we discussed both how the various steps of cognification in the elaboration of the internal representations are combined with the mental maneuverability of the representations and how certain levels of representational development are associated with new capacities for emotional regulation.