[Sidenote: CHANGE OF ATMOSPHERE.—THE JAMS.] While this was going on, a peculiar sensation was experienced, but it was not as disagreeable as that of making the descent. It seemed as though there was a rush of water through the ears, and we were diving. Ascending to the top of the caisson occupied about ten minutes, as the physician in attendance recommends that the change from the high pressure should not be made rapidly. We were all glad to breathe the pure air and enjoy daylight again. Several of the workmen stated that nearly every day some of them suffered from the work below, and said one,— “We have all had the jams.” “What are the jams?” said I. “Well,” said another, “they ain’t the jim-jams, brought on by drink, for we dare not take much, but a feeling like the flesh a tearin’ off of our bones.” “We have the cramps in our legs, body, arms, and chest,” said another, “and at times it causes us so great pain that we cannot work; we do not notice anything amiss until we have been out of the caisson for some hours, sometimes not until the next day. These ‘jams,’ as we call them, go away as quickly as they come, but sometimes return after another visit to the caisson.” The men are cautioned to abstain from drinking spirits, but with some the caution is not heeded, and those that will drink spirits in preference to coffee are generally the greatest sufferers. The construction of the abutments of this bridge is a novel one. It was first introduced on the building of the St. Louis suspension bridge, and since then great improvements have taken place. When completed, the bridge will be a noble monument of engineering skill. XXIX. THE INUNDATION AT LALLE. INUNDATION OF A MINE ON THE LOIRE.—HOW THE MEN WERE SAVED.—SONG OF THE PUPILS OF THE MINING SCHOOL AT ST. ETIENNE.—TERRIBLE FLOOD OF A MINE AT LALLE.—BREAKING IN OF A RIVER.—COURAGE OF AUBERTO, A WORKMAN.—SAVING SIX LIVES.—PLAN FOR RESCUE.—DISCOVERING THE WHEREABOUTS OF THE PRISONERS.—ONE MONTH’S WORK IN THREE DAYS.—OPENING THE DRIFT-WAYS.—SIXTY FEET OF TUNNELLING.—IN THE DARKNESS WITH A CORPSE.—STORY OF THE RESCUED.—THIRTEEN DAYS OF PERIL.—FINDING THE BODIES OF THE DEAD.—ONE HUNDRED AND FIVE MEN DROWNED.—SAVING A CHILD.—EATING WOOD AND LEATHER TO SAVE LIFE.—A HORRIBLE SIGHT.