Pestalozzi, I have understood, was led to the use of them by observing the wants of the young mind, in a similar manner that I was myself.

This is, therefore, one of the many coincidences in thought and discovery by minds wholly independent of each other, which have been directed to the same subjects.

This is an evitable result.

If two men look at the moon, both must see that it is round, bright, and mottled; and if two minds far apart, turn their attention to similar subjects, the probability is that their views will coincide.

The most powerful mind will of course make the deepest and simplest discovery.
Object lessons should be given chiefly on such things as fall under more constant observation and are daily coming before the sight, and then useful knowledge will be accumulated, and frequently reimpressed upon the memory by the seeing of the objects.
GALLERY LESSONS ON A FEATHER.
We will suppose the children all properly seated, the little girls on one side of the gallery and the little boys on the other, as represented on the plan-plate.