a bare trunk, with here and there only the slight outshoot of some 
temporary exploit of genius, but which in this age gives the signs of 
that immense foliage and fruitage which shall in time embower the 
whole earth. We see but its spring-time of leaf,--for it is only within 
fifty years that this rich outburst of wonders began. We live in an era 
when progress is so new as to be a matter of amazement. A hundred 
years hence, perhaps it will have become so much a matter of course to 
develop, to expand, and to discover, that it will excite no comment. But 
it is yet novel, and we are yet fresh. Therefore we may gaze back at 
what has been, and gaze forward at what is promised to be, with more 
likelihood of being impressed than if we were a few centuries older. 
If we look down at the roots out of which this tree has risen, and then 
up at its spreading branches,--omitting its intermediate trunk of ages, 
through which its processes have been secretly working,--perhaps we 
may realize in a briefer space the wonder of it all. 
In the beginning of history, according to received authority, there was 
but a little tract of the earth occupied, and that by one family, speaking
but one tongue, and worshipping but one God,--all the rest of the world 
being an uninhabited wild. At this stage of history the whole globe is 
explored, covered with races of every color, a host of nations and 
languages, with every diversity of custom, development of character, 
and form of religion. The physical bound from that to this is equalled 
only by the leap which the world of mind has made. 
Once upon a time a man hollowed a tree, and, launching it upon the 
water, found that it would bear him up. After this a few little floats, 
creeping cautiously near the land, were all on which men were wont to 
venture. Now there are sails fluttering on every sea, prodigious 
steamers throbbing like leviathans against wind and wave; harbors are 
built, and rocks and shoals removed; lighthouses gleam nightly from 
ten thousand stations on the shore; the great deep itself is sounded by 
plummet and diving-bell; the submarine world is disclosed; and man is 
gathering into his hands the laws of the very winds that toss its surface. 
Once the earth had a single rude, mud-built hamlet, in which human 
dwellings were first clustered together. Now it is studded with splendid 
cities, strewn thick with towns and villages, diversified by infinite 
varieties of architecture: sumptuous buildings, unlike in every clime, 
each as if sprung from its own soil and made out of its air. 
Once there were only the elementary discoveries of the lever, the 
wedge, the bended bow, the wheel; Tubal worked in iron and copper, 
and Naamah twisted threads. Since then what a jump the mechanical 
arts have made! These primitive elements are now so intricately 
combined that we can hardly recognize them; new forces have been 
added, new principles evolved; ponderous engines, like moving 
mountains of iron, shake the very earth; many-windowed factories, 
filled with complex machinery driven by water or its vapor, clatter 
night and day, weaving the plain garments of the poor man and the rich 
robes of the prince, the curtains of the cottage and the upholstery of the 
palace. 
Once there were but the spear and bow and shield, and hand-to-hand 
conflicts of brute strength. See now the whole enginery of war, the art 
of fortification, the terrific perfection of artillery, the mathematical 
transfer of all from the body to the mind, till the battlefield is but a 
chess-board, and the battle is really waged in the brains of the generals. 
How astonishing was that last European field of Solferino, ten miles in
sweep,--with the balloon floating above it for its spy and scout,--with 
the thread-like wire trailing in the grass, and the lightning coursing 
back and forth, Napoleon's ubiquitous aide-de-camp,--with 
railway-trains, bringing reinforcements into the midst of the _melée_, 
and their steam-whistle shrieking amid the thunders of battle! And what 
a picture of even greater magnificence, in some respects, is before us 
to-day! A field not of ten, but ten thousand miles in sweep! McClellan, 
standing on the eminence of present scientific achievement, is able to 
overlook half the breadth of a continent, and the widely scattered 
detachments of a host of six hundred thousand men. The rail connects 
city with city; the wire hangs between camp and camp, and reaches 
from army to army. Steam is hurling his legions from one point to 
another; electricity brings him intelligence, and carries his orders; the 
aëronaut in the sky is his field-glass searching the horizon. It is 
practically but one great battle that is raging beneath    
    
		
	
	
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