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The White Ants, or Termites
but with great difficulty, ascend a perpendicular. To avoid this inconvenience, in the interior vertical parts of the building, a flat pathway, half an inch wide, is often made to wind gradually, like a road cut out of the side of a mountain; by which they travel with great facility up ascents otherwise impracticable. The same ingenious propensity to shorten their labour, seems to have given birth to a contrivance still more extraordinary: this is a kind of bridge, or vast arch, sprung from the floor of the area to the upper apartments at the side of the building, which answers the purpose of a flight of stairs, and must shorten the distance exceedingly in transporting eggs from the royal chambers to the upper nurseries, which in some hills would be four or five feet in the straightest line, and much more if carried through all the winding passages which lead through the inner chambers and apartments. Mr. Smeathman measured one of these bridges, which was half an inch broad, a quarter of an inch thick, and ten inches long, making the size of an elliptic arch of proportionable dimensions, so that it is wonderful it did not fall over, or break by its own weight, before they got it joined to the side of the column above. It was strengthened by a small arch at the bottom, and had a hollow or groove all the length of the upper surface, either made purposely for the greater safety of the passengers, or else worn by frequent treading. It is not the least surprising circumstance attending this bridge, the Gothic arches before spoken of, and in general all the arches of the various galleries and apartments, that, as Mr. Smeathman saw every reason for believing, the termites project them, and do not, as one would have supposed, excavate them.
Consider what incredible labour and diligence, accompanied by the most unremitting activity, and the most unwearied celerity of movement, must be necessary to enable these creatures to accomplish (their size considered) these truly gigantic works. That such diminutive insects, for they are scarcely the fourth of an inch in length, however numerous, should, in the space of three or four years, be able to erect a building twelve feet high, and of proportionable bulk, covered by a vast dome, adorned without by numerous pinnacles and turrets, and sheltering under its ample arch myriads of vaulted apartments, of various dimensions, and constructed of different materials,- that they should moreover excavate, in different directions and at different depths, innumerable subterranean roads or tunnels, some twelve or thirteen inches in diameter, or throw an arch of stone over other roads leading from the metropolis into the adjoining country, to the distance of seven adjoining country, hundred feet, that they should project and finish the vast interior staircases or bridges, lately described, and finally, that the millions necessary to execute such Herculean labours, 2 Q i