A representative from Persia has come to the United States to talk with men interested in international peace and arbitration. He thinks that there is sufficient common ground between the Mohammedans, the Christians, and the followers of Zoroaster, to enable them to work for world's peace. He says that all of these organizations unite in the belief that "the people of the world should love each other, should serve each other; they should become as members of one family; they should throw into the corner of oblivion national, religious, patriotic, and commercial prejudices. They must become united men and women." There are plenty of people who will assent to these beautiful teachings, but a very superficial observer may see that the majority of those who advocate these teachings the most strongly are filled with resentment when their path is crossed. The Aquitania, of the Cunard line, is to be the largest and also one of the speediest ships in the world. She is to be about 915 feet long, which will be some twenty-five feet longer than the large vessels being built in Germany. Her speed is to be 26½ miles an hour; and no vessels in the Atlantic service, except the Mauretania and the Lusitania, will be able to go faster. After the terrible disaster to the Titanic, will not ship-builders be a little cautious about trying to reach the length of a thousand feet with ocean-going vessels? And then on the other hand, would not a smaller vessel have been more completely wrecked and no lives saved at all? On the whole, the large vessels of to-day are many times safer than the smaller ones of twenty-five years ago. The submarine boat Carp, built by the Union Iron Works of San Francisco for the United States navy, recently dived to a depth of 200 feet in San Francisco Bay, and remained there for something over an hour. The vessel was asked to make this test, and her crew claim that she did the work admirably. This is the deepest dive, so far as the records show, of any submarine vessel up to the present time. King George V of England is arranging to learn how to operate an aeroplane. It is said that the queen objects to it, but that the king is quite enthusiastic, and intends to make his first attempt very soon.