"She has had the proper sort of bringing up," remarked Hannah, with a sigh of satisfaction. "She knows exactly how to pack away blankets and how to clean house as it should be done. She is a very unusual young woman!" Coming from Hannah such praise was phenomenal. Mr. Cabot seemed to think, too, that Miss Cartright possessed many virtues. At any rate he enjoyed talking with her, and every evening when the full moon touched with iridescent beauty the wide, pulsing sea he would tuck the girl into her steamer chair and the two would stay up on deck until the clear golden ball of light had climbed high into the heaven. So passed the voyage. Then as America came nearer Giusippe witnessed all the strange sights that heralded the approach to the new continent; he saw the lights dotting the coast; he watched steamers which were outward bound for the old world he had left behind; he strained his eyes to catch, through a telescope, the murky outlines of the land. "Here is still another use to which glass is put, Giusippe," said Mr. Cabot indicating with a gesture the red flash-light of a beacon far against the horizon. "Without the powerful reflectors, lenses, and prisms which are in use in our lighthouses many a vessel would be wrecked. For not only must a lighthouse have a strong light; it must also have a means of throwing that light out, and thereby increasing its effectiveness. Scientists have discovered just how to arrange prisms, lenses, and reflectors so the light will travel to the farthest possible distance. At Navasink, on the highlands south of New York harbor, stands the most powerful coast light in the United States. It equals about sixty million candle-power, and its beam can be seen seventy nautical miles away. The carrying of the light to such a tremendous distance is due to the strong reflectors employed in conjunction with the light itself. The largest lens, however, under control of the United States is on the headlands of the Hawaiian Islands. This is eight and three-quarters feet in diameter and is made from the most carefully polished glass. And by the way, among other uses that science makes of glass are telescopes, microscopes, and field-glasses, which are all constructed from flawlessly ground lenses. Often it takes a whole year, and sometimes even longer, to polish a large telescope lens. Without this magnifying agency we should have no astronomy, and fewer scientific discoveries than we now have. The glasses people wear all have to be ground and polished in much the same fashion; opera glasses, magic lanterns, and every contrivance for bringing distant objects nearer or making them larger are dependent for their power upon glass lenses." "Even when making glass I never dreamed it could be used for so many different purposes," answered Giusippe. "I wish we had counted up, as we went along, how many things it is used for," Jean put in.