Intolerable as the influence was of this ill-fated blast, it increased in power, until it blew a gale. The distant mountains, seen across the surface of the sea, were curtained by mists of a purple and deadly hue. The sky above was covered with bronze-colored clouds, through which the declining sun shone, red and rayless, diffusing over the whole face of nature, instead of light, a sort of lurid and awful gloom. The sun went down, and the shades of the evening came on, but the heat increased. The thermometer rose to 106°. The wind was like the blast of a furnace. The men, without pitching their tents or making any other preparations for the night, threw themselves down upon the ground, panting and exhausted, and oppressed with an intolerable thirst. They went continually to the "water breakers," in which their supplies of water were kept, and drank incessantly, but their thirst could not be assuaged. Things continued in this state till midnight. The wind then went down, and very soon afterward a gentle breeze sprung up from the northward. The thermometer fell to 82°, and the Sirocco was over. THE PILLAR OF SALT. Mr. Lynch's party visited the salt mountain of Usdum, of which we have already spoken, and examined it throughout its whole extent, in a very careful and thorough manner. They found at one place, at the head of a deep and narrow chasm, a remarkable conformation of the salt rock, consisting of a tall cylindrical mass, standing out detached, as it were, from the mountain behind it, and appearing like an artificial column. It was in fact literally a pillar of salt. It was forty or fifty feet high, and was capped above with a layer of limestone, a portion perhaps of the once continuous calcareous stratum, which at some remote geological period had been deposited over the whole bed of salt. The appearance of the pillar was as if it were itself a portion of the salt mountain that had been left by the gradual disintegration and wearing away of the adjoining mass, having assumed and preserved its tall and columnar form, through the protecting influence of the cap of insoluble rock on its summit. The mass, though as seen in front it appeared to stand isolated and alone like a pillar, was connected with the precipice behind it by a sort of buttress, by means of which some of the party climbed up to the top of the gigantic geological ruin, and standing upon the pinnacle, looked down upon their companions below, and upon the wide scene of desolation and death which was spread out before them. EXCURSION TO KERAK.