their own expenses.

Great as is the value to a country of a free and facile interchange of
commodities and ideas between its different parts, of not less--under
many circumstances far greater--importance is its wide and complete
intercourse with foreign lands. Provincial differences are never
so marked as national. The latter are those of distinct
idiosyncrasies--the former, but modifications of one and the same. To
study members of our own family is only somewhat to vary the study of
ourselves. Really to learn we must go outside of that circle. Hence
the tremendous effect of the world-searching commerce of modern times
in the enlightenment and enrichment of the race.

For the best fruits of the exposition its projectors and all concerned
in its success looked abroad. In this estimate of highest results they
had the example of Europe. It was remembered that British exports
rose from one hundred and thirty-one millions sterling in 1850 to two
hundred and fourteen in 1853--an increase equal to our average annual
export at present, and double what it was at that time. The declared
satisfaction of Austria with her apparent net loss of seven millions
of dollars by the exhibition of 1873, in view of the offset she
claimed in the stimulus it gave to her domestic industry and the
extended market it earned for her foreign trade, was also eloquent. We
must therefore address the world in the way most likely to ensure its
attention and attendance. The chief essential to that end was that it
should be official. Government must address government.

[Illustration: MACHINERY HALL.]

Naturally, this necessity was apparent from the beginning. Congress