National Geographic : 1904 Dec
498 THE NATIONAL GE, "Sometimes both birds raise their head in air, and either one or both utter the indescribable and ridiculous bovine groan (see picture 3). When they have finished, they begin bowing at each other again, almost always rapidly al ternately, and presently repeat the per formance, the birds reversing their r6le in the game or not. There is no hard and fast order to these antics, which the seamen of the Albatross rather aptly called a 'cake-walk,' but many varia tions occur. "Occasionally one will lightly pick up a twig or grass straw and present it to the other. This one does not accept the gift, however, but thereupon re turns the compliment, when straws are promptly dropped, and all hands begin bowing and walking about as if their lives depended upon it. If one stands where albatrosses are reasonably abun dant, he can see as many as twenty couples hard at work bowing and groan ing on all sides and paying not the slightest attention to his presence." In spite of this excellent use of all Sulphur Mine in Nevada.-The amount of sulphur produced in the United States is but a small percentage of the amount annually consumed. Three states, Lou isiana, Nevada, and Utah, named in the order of their importance as producers of sulphur, contribute to the domestic output. Their united production for 1902 was 8,336 short tons, valued at $220,560. In addition to this, the coun try consumed 174,939 long tons of im ported sulphur, principally from Sicily. But for the unfortunate fact that there is no duty on imported sulphur, the production from native deposits might be expected to increase in proportion to the demand. Mr George I. Adams has written for a recent bulletin (No. 225) of the U. S. Geological Survey, entitled " Contributions to Economic Geology, 1903," a capital description of the Rab bit Hole sulphur mines of Nevada. It GRAPHIC MAGAZINE the space at their disposal, the birds which have chosen Laysan for their breeding home would not be able to find satisfactory places if they all arrived at the same time. They are, therefore, obliged to take turns, so that some spe cies of sea birds leave the place as soon as their young are strong enough to fly, and while the former occupant is leaving, the new-comers already begin to arrive. Thus there is a constant coming and going, and it follows that breeding species are found at almost every season of the year-a fact which is remarkable even in the tropics,where the breeding season is generally less regular than in our latitudes. In this way a most definite succession, which probably dates back thousands of years, takes place year after year in the ar rival and departure of certain species. A commercial company makes a good profit out of the phosphate deposits on the island. At one time it also made money out of the albatross eggs (see picture, page 495), but this wanton prac tice has since been stopped. is thought that the sulphur at these mines was derived from a great depth and deposited as a result of solfataric action. The sulphur is obtained from open pits, tunnels, and underground cham bers. In its more beautiful form it oc curs as masses of crystals depending from the walls of irregular cavities and incrusting free surfaces. It has the beautiful yellow color of crystallized sulphur, with here and there a reddish tinge due to the presence of a small amount of cinnabar. The most impor tant mass of sulphur is, however, of a different type, and has the appearance of having originated in a flow of molten sulphur which welled up and filled open channels in the rocks. It contains oc casional fragments of rocks, but is re markably pure. Its color is a dark resinous yellow.