That we are going to have successive generations of such builders may be reasonably implied from past expositions.

Beginning with Philadelphia in 1876, and going on to San Francisco and San Diego in 1915, nothing seems to stop us from the habit.

Let us enlarge this proclivity into a national mission in as definite a movement, as thoroughly thought out as the evolution of the public school system, the formation of the Steel Trust, and the like.

After duly weighing all the world's fairs, let our architects set about making the whole of the United States into a permanent one.

Supposing the date to begin the erection be 1930.