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PLATING OF GLASS. Pour some mercury on a tin foil, smoothly laid on a flat table, and rub it gently with a hare's foot. It soon unites itself to the tin, which then becomes very splendid, or is what they call quickened. A plate of glass is then cautiously, passed upon the tin leaf, in such a manner as to sweep off the redundant mercury, which is not incorporated with the tin.
"Was it unintentionally that the Abraham Lincoln pursued me all over the seas? Was it unintentionally that you took passage in this frigate? Was it unintentionally that your cannon-balls rebounded off the plating of my vessel? Was it unintentionally that Mr. Ned Land struck me with his harpoon?" I detected a restrained irritation in these words.
We had no knives, and no artery forceps, and not a stitch of catgut; but we had an oesophagoscope, and the very latest possible pattern of cystoscope, and a marvellous set of tools for plating fractures. It reminded one of the costume of an African savage a silk hat, and nothing else.
It has to be handled very carefully and considerately if one is to get what possible drops of water it may contain. The human tin-cup seems to bulk very big in the drinking process, sometimes, in my corner of the planet. It is silver-plated sometimes; just common tin under the plating.
"I accept your calculations, captain," I replied, "and I'd be ill-mannered to dispute them, since your daily experience bears them out. But at this juncture, I have a hunch that we're still left with one real difficulty." "What's that, sir?" "When you're at a depth of 1,000 meters, the Nautilus's plating bears a pressure of 100 atmospheres.
But I did not care; the purpose which I had in mind was fully worth all the damage and more, and I knew now that unless I personally was hit and disabled, I should be able to accomplish it. For I meant to give that impudent destroyer the stem, to run her down and sink her, knowing that our stout bows would shear through her thin plating as though it were paper.
The only sounds were the lapping of the waves along the riven hull and the intermittent reports of the quick-firers. Then came the shrill squeal of the pipes. "Fall in!" roared a voice down the hatchway. "Clear lower deck! Every soul on deck!" The bugle rang out again. Thorogood staggered with his burden across the buckled plating of the flat, and reached the hatchway.
Partly obscured by the fragile-seeming framework about it, there was bright plating in swelling curves, and the plating reached up irregularly and followed a peculiar pattern, and above the plating there were girders themselves shining brightly in the light of many arc lamps and they rose up and up toward the roof of the Shed itself.
Twenty-one steam-engines and thirty-five boilers were needed. Prepared timber was brought from eight different States, and the first iron plating used in the war was rolled not only in Saint Louis and Cincinnati, but in small towns in Ohio and Kentucky. Within two weeks 4000 men were at work in places miles apart, working by night and seven days a week.
The most of this surface is, however, so rough as to be with difficulty polished, without in places removing entirely this pellicle of pure metal, and exposing a polished surface of the alloy used in plating. Whenever such metal was used, very unsightly stains or spots frequently disfigured the portraits.
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