Under the Waves: Diving in Deep Waters by R. M. Ballantyne (best romance ebooks TXT) đź“•
Read free book «Under the Waves: Diving in Deep Waters by R. M. Ballantyne (best romance ebooks TXT) 📕» - read online or download for free at americanlibrarybooks.com
- Author: R. M. Ballantyne
Read book online «Under the Waves: Diving in Deep Waters by R. M. Ballantyne (best romance ebooks TXT) 📕». Author - R. M. Ballantyne
“All right?” demanded the supernumerary.
“Right,” responded Maxwell, in a voice which issued sepulchrally from the iron globe.
There are three round windows fitted with thick plate-glass in the helmets to which we refer. The front one is made to screw off and on, and the fixing of this is always the last operation in completing a diver’s toilet.
“Pump away,” said the man, holding the round glass in front of Maxwell’s nose, and looking over his shoulder to see that the order was obeyed. The glass was screwed on, and the man finished off by gravely patting Maxwell in an affectionate manner on the head.
“Why does he pat him so?” asked Edgar, with a laugh at the apparent tenderness of the act.
“It’s a tinder farewell, I suppose,” murmured Rooney, “in case he niver comes up again.”
“It is to let him know that he may now descend in safety,” answered Baldwin. “The pump there is kep’ goin’ from a few moments before the front-glass is screwed on till the diver shows his head above water again—which he’ll do in quarter of an hour or so, for it don’t take long to lay a charge; but our ordinary spell under water, when work is steady, is about four hours—more or less—with perhaps a breath of ten minutes once or twice at the surface when they’re working deep.”
“But why a breath at the surface?” asked Edgar. “Isn’t the air sent down fresh enough?”
“Quite fresh enough, Mister Edgar, but the pressure when we go deep—say ten or fifteen fathoms—is severe on a man if long continued, so that he needs a little relief now and then. Some need more and some less relief, accordin’ to their strength. Maxwell has only gone down fifteen feet, so that he wouldn’t need to come up at all durin’ a spell of work. We’re goin’ to blast a big rock that has bin’ troublesome to us at low water. The hole was driven in it last week. We moored a raft over it and kep’ men at work with a long iron jumper that reached from the rock to the surface of the sea. It was finished last night, and now he’s gone to fix the charge.”
“But I don’t understand about the pressure, sur, at all at all,” said Machowl, with a complicated look of puzzlement; “sure whin I putt my hand in wather I don’t feel no pressure whatsomediver.”
“Of course not,” responded Baldwin, “because you don’t put it deep enough. You must know that our atmosphere presses on our bodies with a weight of about 20,000 pounds. Well, if you go thirty-two feet deep in the sea you get the pressure of exactly another atmosphere, which means that you’ve got to stand a pressure all over your body of 40,000 when you’ve got down as deep as thirty-two feet.”
“But,” objected Rooney, “I don’t fed no pressure of the atmosphere on me body at all.”
“That’s because you’re squeezed by the air inside of you, man, as well as by the atmosphere outside, which takes off the feelin’ of it, an’, moreover, you’re used to it. If the weight of our atmosphere was took off your outside and not took off your inside—your lungs an’ the like,—you’d come to feel it pretty strong, for you’d swell like a balloon an’ bu’st a’most, if not altogether.”
Baldwin paused a moment and regarded the puzzled countenance of his pupil with an air of pity.
“Contrairywise,” he continued, “if the air was all took out of your inside an’ allowed to remain on your outside, you’d go squash together like a collapsed indyrubber ball. Well then, if that be so with one atmosphere, what must it be with a pressure equal to two, which you have when you go down to thirty-two feet deep in the sea? An’ if you go down to twenty-five fathoms, or 150 feet, which is often done, what must the pressure be there?”
“Tightish, no doubt,” said Rooney.
“True, lad,” continued Joe. “Of course, to counteract this we must force more air down to you the deeper you go, so that the pressure inside of you may be a little more than the pressure outside, in order to force the foul air out of the dress through the escape-valve; and what between the one an’ the other your sensations are peculiar, you may be sure.—But come, young man, don’t be alarmed. We’ll not send you down very deep at first. If some divers go down as deep as twenty-five fathoms, surely you’ll not be frightened to try two and a half.”
Whatever Rooney’s feelings might have been, the judicious allusion to the possibility of his being frightened was sufficient to call forth the emphatic assertion that he was ready to go down two thousand fathoms if they had ropes long enough and weights heavy enough to sink him!
While the recruit is preparing for his subaqueous experiments, you and I, reader, will go see what Maxwell is about at the bottom of the sea.
When the diver received the encouraging pat on the head, as already related, he descended the ladder to its lowest round. Here, being a few feet below the surface, the buoyancy of the water relieved him of much of the oppression caused by the great weights with which he was loaded. He was in a semi-floating condition, hence the ladder, being no longer necessary, was made to terminate at that point. He let go his hold of it and sank gently to the bottom, regulating his pace by a rope which descended from the foot of the ladder to the mud, on which in a few seconds his leaden soles softly rested. A continuous stream of air-bubbles from the safety-valve behind the helmet indicated to those above that the pumps were doing their duty, and at the same time hid the diver entirely from their sight.
Meanwhile the two men who acted as signalman and assistant stood near the head of the ladder, the first holding the life-line, the assistant the coil of air-tubing. Their duty was to stand by and pay out or haul in tubing and line according as the diver’s movements and necessities should require. They were to attend also to his signals—some of which were transmitted by the line and some by the air-tube. These signals vary among divers. With Baldwin and his party one pull on the life-line meant “All right;” four pulls, “I’m coming up.” One pull on the air-pipe signified “Sufficient air;” two pulls, “More air.” (pump faster.) Four pulls was an alarm, and signified “Haul me up.” The aspect of Rooney Machowl’s face when endeavouring to understand Baldwin’s explanation of these signals was a sight worth seeing!
But to return to our diver. On reaching the bottom, Maxwell took a coil of small line which hung on his left arm, and attached one end of it to a stone or sinker which kept taut the ladder-line by which he had descended. This was his clew to guide him back to the ladder. Not only is the light under water very dim—varying of course, according to depth, until total darkness ensues—but a diver’s vision is much weakened by the muddy state of the water at river-mouths and in harbours, so that he is usually obliged to depend more on feeling than on sight. If he were to leave the foot of his ladder without the guiding-coil, it would be difficult if not impossible to find it again, and his only resource would be to signal “Haul me up,” which would be undignified, to say the least of it! By means of this coil he can wander about at will—within the limits of his air-tube tether of course,—and be certain to find his way back to the ladder-foot in the darkest or muddiest water.
Having fastened the line, the diver walked in the direction of the rock on which he had to operate, dropping gradually the coils of the guiding-line as he proceeded. His progress was very slow, for water is a dense medium, and man’s form is not well adapted for walking in it—as every bather knows who has attempted to walk when up to his neck in it. He soon found the object of his search, and went down on his knees beside the hole already driven into the rock. Even this process of going on his knees was not so simple as it sounds, for the men above were sending down more air than could escape by the valve behind the helmet, and thus were filling his dress to such an extent that he had a tendency to rise off the ground despite his weights. To counteract this he opened the valve in front, let out the superabundant air, got on his knees, and was soon busy at work inserting the charge-tube into the hole and tamping it well home, taking care that the fine wire with which it communicated with the party in the barge should not be injured.
While thus engaged he was watched, apparently with deep interest, by a small crab, a shrimp, and several little fish of various kinds, all of which we may add, seemed to have various degrees of curiosity. One particular little fish, named a goby, and celebrated for its wide-awake nature and impudence, actually came to the front-glass of the helmet and looked in. But the diver was too busy to pay attention to it. Nothing abashed, the goby went to each of the side-windows, but, receiving no encouragement, it made for a convenient ledge of the rock, where, resting its fore-fins on a barnacle, it turned its head a little on one side and looked on in silence. Finding this rather tedious, after a time it went, with much of the spirit of a London street-boy, and, passing close to the shrimp, tweaked the end of one of its feelers, causing that volatile creature to vanish. It then made a demonstration of attack on the crab, but that crustaceous worthy, sitting up on its hind-legs and expanding both claws with a very “come-on-if-you-dare” aspect, bid it defiance.
Meanwhile the charge was laid, and Maxwell rose to return to the world above. Feeling a certain uncomfortable hotness in the air he breathed, and observing that his legs were remarkably thin, and that his dress was clasped somewhat too lovingly about his person, he became aware of the fact that, having neglected to reclose the front-valve, his supply of air was now insufficient. He therefore shut the valve and began to wend his way back to the ladder. By the time he reached it the air in his dress had swelled him out to aldermanic dimensions, so that he pulled himself up the ladder-rope, hand over hand, with the utmost ease—having previously given four pulls on his life-line to signal “coming up.” A few seconds more and his head was seen to emerge from the surface, like some goggle-eyed monster of the briny deep.
A comrade at once advanced and unscrewed his front-glass, and then, but not till then, did the men at the pumps cease their labours.
“All right,” said Maxwell, stepping over the side and seating himself on his plank.
“Stand by,” said Baldwin.
The two satellites did not require that order, for they were already standing by with a small electrical machine. The wire before mentioned as being connected with the charge of powder, now safely lodged in the hole at the bottom of the sea, was connected with the electrical machine, and a few vigorous turns of its handle were given, while every eye was turned expectantly on the surface of the sea.
That magic spark which now circles round the world, annihilating time and space, was evolved; it flashed down the wire; the ocean could not put it out; the dry powder received it; the massive rock burst into fragments; a decided shock was felt on board the barge, and a turmoil of gas-bubbles and
Comments (0)