in all parts of the universe, is worth our consideration.

The dimensions of individual natural bodies are either quite
indeterminate, as in the case of planets, stones, trees, &c., or they
vary within moderate limits, as in the case of seeds, eggs, &c.; but
even in these cases small quantitative differences are met with which
do not interfere with the essential properties of the body.

Even crystals, which are so definite in geometrical form, are variable
with respect to their absolute dimensions.

Among the works of man we sometimes find a certain degree of
uniformity.

There is a uniformity among the different bullets which are cast in
the same mould, and the different copies of a book printed from the
same type.

If we examine the coins, or the weights and measures, of a civilized
country, we find a uniformity, which is produced by careful adjustment
to standards made and provided by the state. The degree of uniformity
of these national standards is a measure of that spirit of justice in
the nation which has enacted laws to regulate them and appointed
officers to test them.

This subject is one in which we, as a scientific body, take a warm
interest; and you are all aware of the vast amount of scientific work
which has been expended, and profitably expended, in providing weights
and measures for commercial and scientific purposes.