In some seas there are swift currents and as the dress-diver remains under water for some time, instead of returning at once like his naked brother, he must keep moving with it, and as he moves, the boat must move in unison and his tender must keep the lines free. Both diver and tender must be skilful and alert to do this. Nor is it always easy in deep-sea diving to find the oysters. They lie in scattered bunches, often hidden by sponges, coral or other sea growths, their gray or moss-grown exteriors scarcely to be distinguished from the surroundings; if in mud, only an inch or so of the sharp lips of the two valves projecting above the surface are in evidence; while if in stooping to gather the shells he should fall, he is likely to shoot feet foremost to the surface. Though dress-diving has heretofore been confined almost entirely to white men, the Japanese, Chinese, Malays, South Sea Islanders, and others in different places, are now being educated to it chiefly through an Australian fishery. At the northwestern corner of Australia, a thousand miles from the nearest railroad and ten days from the nearest port, there are pearl fisheries where the climate is so hot that white men cannot be obtained for the work. Colored men are shipped there from Singapore to man the boats, the pearl-fishers giving a bond to the government of 100 pounds sterling for each man employed, as a guarantee that he will not go to other parts of the state. A fleet of about three hundred boats and fifteen hundred men are employed there, the supply station being at Broome township. In all things, when once the improvements of science gain a foothold anywhere in the world, the whole earth succumbs eventually to their advantages, and so with diving; the habits and prejudices of thousands of years will be forced by commercial pressure to submit themselves to modern appliances, and the picturesque nakedness of the swarthy orient will soon be hidden under the ugly but useful dress of civilization. HABITAT OF THE PEARL OYSTER The Pearl Oyster is found in more or less abundance on the shoals and reefs about the shores of every land within a belt of the earth lying between 30 degrees north and south of the equator. Coral reefs and limestone foundations usually form the beds on which they propagate. Beyond these limits the abalone is found at Japan, on the California coast, Queen Charlotte's Island, the Cape, Australia, New Zealand, China, about the English Channel, and on the coast of France, where the shores are washed by equatorial currents. It exists also on the shores of India and the Canary Islands.