“Perfectly capable. Though fragile on impact, crystal can still offer considerable resistance. In 1864, during experiments on fishing by electric light in the middle of the North Sea, glass panes less than seven millimeters thick were seen to resist a pressure of sixteen atmospheres, all the while letting through strong, heat-generating rays whose warmth was unevenly distributed. Now then, I use glass windows measuring no less than twenty-one centimeters at their centers; in other words, they’ve thirty times the thickness.” “Fair enough, captain, but if we’re going to see, we need light to drive away the dark, and in the midst of the murky waters, I wonder how your helmsman can—” “Set astern of the pilothouse is a powerful electric reflector whose rays light up the sea for a distance of half a mile.” “Oh, bravo! Bravo three times over, captain! That explains the phosphorescent glow from this so-called narwhale that so puzzled us scientists! Pertinent to this, I’ll ask you if the Nautilus’s running afoul of the Scotia, which caused such a great uproar, was the result of an accidental encounter?” “Entirely accidental, sir. I was navigating two meters beneath the surface of the water when the collision occurred. However, I could see that it had no dire consequences.” “None, sir. But as for your encounter with the Abraham Lincoln . . . ?” “Professor, that troubled me, because it’s one of the best ships in the gallant American navy, but they attacked me and I had to defend myself! All the same, I was content simply to put the frigate in a condition where it could do me no harm; it won’t have any difficulty getting repairs at the nearest port.” “Ah, commander,” I exclaimed with conviction, “your Nautilus is truly a marvelous boat!”