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"Suppose I told you that men brought up inside of boilers, hammering on the inside against twenty hammering like Wulcans on the outside, get their ears so dumfounded that they can't tell whether they are saying valves or walves, wice or virtue, suppose I told you that, what would you say, Belle?"
Q. Are marine constructed in the same way as land boilers? A. There is very little difference in the two cases: the whole of the shells of marine boilers, however, should be double riveted with rivets 11/16ths of an inch in diameter, and 2-3/8th inches from centre to centre, the weakening effect of double riveting being much less than that of single riveting.
A. One useful precaution against the explosion of boilers from too great an internal pressure, consists in the application of a steam gauge to each boiler, which will make the existence of any undue pressure in any of the boilers immediately visible; and every boiler should have a safety valve of its own, the passage leading to which should have no connection with the passage leading to any of the stop valves used to cut off the connection between the boilers; so that the action of the safety valve may be made independent of the action of the stop valve.
The naval and the merchant ships of this country and of England are fitted and being fitted to use it either under steam boilers as fuel or directly in the Diesel engine. The airplane has been made possible by it. It propels that modern juggernaut, the tank. In the air it has no rival, while on land and sea it threatens the supremacy of its rivals whenever it appears.
I never heard any one connect this noise with the danger of boiler explosion, in the event of the ship sinking with her boilers under a high pressure of steam, which was no doubt the true explanation of this precaution.
While still in the Humber, and not twenty miles from Hull, it was found that one of the boilers leaked, but the captain refused to put about. The pumps were set to work to fill the boiler, and the vessel kept on her way, though slowly, not passing between the Farne Islands and the mainland till Thursday evening.
Trains were running as usual to Hamburg, if one cared to go there. "As usual" in war time was the ratio of one to five in peace time. At Hamburg, in sight of steamers with cold boilers and the forests of masts of idle ships, one saw what sea power meant. That city of eager shippers and traders, that doorstep of Germany, was as dead as Ypres, without a building being wrecked by shells.
The detonation of the bursting boilers, resounding through the city, set the excited Sunday crowd very near to a panic. This was accelerated by the constant fear of airship attacks, and most of the population that was not already in active flight from the city sought safety in cellars.
The cement should be used on the same day as the oil is added, else it will be set into a solid mass. Q. What is the best length of the furnaces of marine boilers?
But all in all, taking her from truck to helm, considering the dimensions of the cook's boilers, including his own live parchment boilers; fore and aft, I say, the Samuel Enderby was a jolly ship; of good fare and plenty; fine flip and strong; crack fellows all, and capital from boot heels to hat-band.
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