The Birmingham age-herald., 1910-10-02

principles upon which the Nautilus was
 room.
 l Here" said the captain, "are the in-
 struments by which I guide the Nau-
 titus. Some of them are known to you, such as the thermometer, which gives
 the internal temperature of the ship,
 the barometer, which foretels the changes of the weathera the hygrom- eter, which marks the dryness of the atmosphere; the storm glass, the con-
 tents of which, by decomposing, an-
 nounce the coming of a tempest; the
 compass and the sextant. And this | instrument is a manometer-this dial
 with a movable needle. But it is in
 communication with the sea water
 whose external pressure 1t Registers
 and thus gives us our depth at the
 same time. And, here, professor,
 ought to give you some explanation.
 There is a powerful agent, obedient,
 rapid, easy, which conforms to every
 use and reigns supreme on beard my
 vessel. Everything here Is done by
 It. it lights, 1t warns, it is the soul of the mechanical apparatus. This agent is electricity"
 "Electricityl' cried the professor in surprise, but, captain. you possess an
 does not agree well with the known
 achievements of electricity. Until now | its force has lain under restraint and has produced only a small amount of | power" My electricity is not every body's electricity" retorted the captain.
 You know what sea water is com posed of? In a thousand grams are 96 E | per cent of water and about 2 2-3 | per cent of chloride of magnesium, sul- phate of magnesia and of potassium, bromide of magnesium, sulphate of magnesia, sulphate and carbonate of lime. Chloride of sodium forms very large per cent of it. So 1t is this so- dium which l extract from the sea wa ter and of which I compose my in- | gredients. l owe it all to the ocean; 1t produces my light, my motive power the whole world of the life of the
 Nautilus. I could compress the air l
 need for my consumption, but 1t is use less since l go up to the surface when I please.
 | However, if electricity does not fur
 nsh me with the air I breathe, it works
 the powerful pumps that store 1t in capacious reservoirs under pressure and
 enables me to prolong at need my stay
 in the depths of the ocean. Electricity
 gives me a uniform and unintermittent is run by electricity and with regu- larity which defies chronometers. An other application of electricity; this dial hung in front of you indicates the speed of the Nautilus. An electrical
 thread connects it with the screw and | registers thus it's revolutions, the needle indicates the real speed. In the kitchen, as you saw, electricity does all | the cooking. Streams of electricity un-
 der the cooking stoves give to platinum sponges a heat which Is regular and well distributed. They also heat the distilling apparatus which, by evapora- tion, supplies me with fresh water. The bathroom, as you saw, is supplied with hot and cold water taps by the same means"
 | The professor was especially inter- ested in the engine room of the Nau- illus This room, clearly lighted, did
 not measure less than 65 feet in length.
 It was divided into two parts, the first
 containing the materials for producing
 electricity and the second tthe ma zt.t <t. You see" said the captain, that l