It is perhaps hardly necessary to remind the reader that children’s ideas of distance before they begin to travel far are necessarily very inadequate. They are disposed to localise the distant objects they see, as the sun, moon and stars, and the places they hear about on the earth’s surface as near as possible. The tendency to approximate things as seen in the infant’s stretching out of the hand to touch the moon lives on in the later impulse to localise the sky and heavenly bodies just beyond the farthest terrestrial object seen, as when a child thought they were just above the church spire, another that they could be reached by tying a number of ladders together, another that the setting sun went close behind the ridge of hills, and so forth. The stars, being so much smaller looking, seem to be located farther off than the sun and moon. Similarly when they hear of a distant place, as India, they tend to project it just beyond the farthest point known to them, say Hampstead, to which they were once taken on a long, long journey from their East End home. A child’s standard of size and distance is, as all know who have revisited the home of their childhood after many years, very different from the adult’s. To the little legs unused as yet to more than short spells of locomotion a mile seems stupendous: and then the half-formed brain cannot yet pile up the units of measurement well enough to conceive of hundreds and thousands of miles. The child appears to think of the world as a circular plain, and of the sky as a sort of inverted bowl upon it. C.’s sister used on looking at the sky to fancy she was inside a blue balloon. That is to say he takes them to be what they look. In a similar manner C. took the sun to be a great disc which could be put on the round globe to make a ‘see-saw’. When this ‘natural realism’ gets corrected, children go to work to convert what is told them into an intelligible form. Thus they begin to speculate about the other side of the globe, and, as Mr. Barrie reminds us, are apt to fancy they can know about it by peeping down a well. When religious instruction introduces the new region of heaven they are apt to localise it just above the sky, which to their thought forms its floor. Some genuine thought-work is seen in the effort to harmonise the various things they learn by observation and instruction about the celestial region into a connected whole. Thus the sky is apt to be thought of as _thin_, this idea being probably formed for the purpose of explaining the shining through of moon and stars. Stars are, as we know, commonly thought of by the child as holes in the sky letting through the light beyond. One Boston child ingeniously applied the idea of the thinness of the sky to explain the appearance of the moon when one half is bright and the other faintly illumined, supposing it to be half-way through the partially diaphanous floor. Others again prettily accounted