THE WATCHMAN'S DOUBLE VISION My successors in the use of the dynamite plant at Maxim had in their employ a day-watchman, an all-round combination useful and useless man, his usefulness and uselessness alternating with the alternation of his sobriety and inebriety. One morning, after a night out, he proceeded to build the fire in the laboratory stove. To start up the kindling wood, he had been in the habit of lighting a handful of shavings, and then pouring on a little kerosene from a tomato can, which he kept upon a near-by shelf. During that night, someone--possibly one of the laboratory operatives--had placed a similar can, filled with nitroglycerin, upon the same shelf, to keep it from freezing. In periods of convalescence from his various stages of intoxication, the watchman had before seen two cans upon that shelf or shelves, but he knew that one of them was real, and the other an hallucination. Couldn't fool him that way! Thinking that the hallucination would naturally be the lighter of the two cans, he took the one containing the nitroglycerin, and proceeded to pour it upon the fire. There was so little of him left together after the explosion that, like Captain Castagnette, he died of surprise at seeing himself so dissipated. THE ZEALOUS FOOL On one occasion, at my laboratory near the shores of Lake Hopatcong, I was conducting some experiments to test the efficiency of the safety chamber of a detonating fuze for exploding projectiles charged with Maximite. The huge loaded shell armed with a fuze was placed in a pit and fixed so as to be set off by electricity from a distance. To prevent any possibility of a circuit being formed to explode the detonator while making the connections at the pit, I went into the machine-shop, and opened the switch at the other end of the wires where they were connected with the battery. Not only did I take this precaution, but I disconnected also the wires themselves, in order to make assurance doubly sure. Returning to the pit to connect up, my assistant, my wife and my father-in-law accompanied me. My assistant descended into the pit, while we stood over him, looking on. The instant he brought the wires in contact, the detonator went off. We looked at one another in amazement. It takes time to get thoroughly scared; but, as soon as we realized the full danger through which we had passed, we were numb with fright. Even now, when I think of it, I have a creepy feeling. We had made half a dozen tests before this, and all of the shells had exploded except one. This was the second in which the safety-chamber had proved effectual. Had it failed this time, and had the Maximite charge exploded in the huge shell, we should all have been blown to ribbons.