It operates similar to the graph machines we have on Earth. To demonstrate, he selected an individual who was talking to another on the street. We saw the man through the hatch, heard his voice through the receiver and watched the machine registering the pitches of sound. One of the Moonalite boys with us understood the language so he chalked down in his own way the words heard through the receiver. We compared the written words with the graph made by this machine on the pitch basis and they were identical. This machine is so fine in its performance that while they are travelling, should the ship produce in any part of it a strange vibration that is not supposed to be there, it also registers that and shows where it is. This makes the ships almost foolproof. If there happens to be a meteor encountered in travelling, the machine warns them of its approach. It seems to be built to distinguish between various types of vibrations and to give the answer as to what they might be. When it warns them of meteors, the pilot immediately throws the repulsing power of the ship into operation, for the body of the ship is equipped with such a power, and since all meteors have a certain amount of metal in them, this power repulses them. According to our informer, the nearest a meteor has ever come to one of these ships was within two hundred fifty miles. In case of trouble, a picture can be sent from the ship by means of another apparatus they are showing us, to the nearest stopping station or to the planet of the emergency. In other words, the intricate machinery within this big Martonian ship was more than our minds could fathom. They even have an emergency water-maker. It seems that this water-maker catches the air or atmosphere, similar to a ventilator and then condenses the air into fresh water. This ship has enough electrical power, when all its engines are going, to illuminate a city as large as New York and make it look like daylight. They do not know its speed for they have never had it fully open. The highest speed they had ever reached was one million, nine hundred thousand miles per hour, and they said it could do better than that. Such speed was unbelievable to us. Bob commented that he wondered how they or the ship could stand that speed.