Part 18 (1/2)

”I am speaking seriously,” he said, ”and I have accepted your challenge; your own eyes shall view the facts, your own hands prepare the conditions necessary. Procure a few pints of sand, and a few pounds of salt; to-morrow evening I will be ready to make the experiment.”

”Agreed; if you will induce a stream of water to run up hill, a fountain to rise above its head, I will believe any statement you may henceforth make.”

”Be ready, then,” he replied, ”and procure the materials named.” So saying he picked up his hat and abruptly departed.

These substances I purchased the next day, procuring the silver sand from Gordon's pharmacy, corner of Eighth and Western Row, and promptly at the specified time we met in my room.

He came, provided with a cylindrical gla.s.s jar about eighteen inches high and two inches in diameter (such as I have since learned is called a hydrometer jar), and a long, slender drawn gla.s.s tube, the internal diameter of which was about one-sixteenth of an inch.

”You have deceived me,” I said; ”I know well enough that capillary attraction will draw a liquid above its surface. You demonstrated that quite recently to my entire satisfaction.”

”True, and yet not true of this experiment,” he said. ”I propose to force water through and out of this tube; capillary attraction will not expel a liquid from a tube if its mouth be above the surface of the supply.”

He dipped the tip of a capillary tube into a tumbler of water; the water rose inside the tube about an inch above the surface of the water in the tumbler.

”Capillary attraction can do no more,” he said. ”Break the tube one-eighth of an inch above the water (far below the present capillary surface), and it will not overflow. The exit of the tube must be lower than the surface of the liquid if circulation ensues.”

He broke off a fragment, and the result was as predicted.

Then he poured water into the gla.s.s jar to the depth of about six inches, and selecting a piece of very thin muslin, about an inch square, turned it over the end of the gla.s.s tube, tied it in position, and dropped that end of the tube into the cylinder.

”The muslin simply prevents the tube from filling with sand,” he explained. Then he poured sand into the cylinder until it reached the surface of the water. (See Figure 23.)

”Your apparatus is simple enough,” I remarked, I am afraid with some sarcasm.

”Nature works with exceeding simplicity,” he replied; ”there is no complex apparatus in her laboratory, and I copy after nature.”

Then he dissolved the salt in a portion of water that he drew from the hydrant into my wash bowl, making a strong brine, and stirred sand into the brine to make a thick mush. This mixture of sand and brine he then poured into the cylinder, filling it nearly to the top. (See Figure 23, B. The sand settling soon left a layer of brine above it, as shown by A.) I had previously noticed that the upper end of the gla.s.s tube was curved, and my surprise can be imagined when I saw that at once water began to flow through the tube, dropping quite rapidly into the cylinder. The lower end of the curve of the gla.s.s tube was fully half an inch above the surface of the liquid in the cylinder.

I here present a figure of the apparatus. (Figure 23.)

The strange man, or man image, I do not know which, sat before me, and in silence we watched the steady flow of water, water rising above its surface and flowing into the reservoir from which it was being continually derived.

”Do you give up?” he asked.

”Let me think,” I said.

”As you please,” he replied.

”How long will this continue?” I inquired.

”Until strong salt water flows from the tube.”

Then the old man continued:

”I would suggest that after I depart you repeat these experiments. The observations of those interested in science must be repeated time and again by separate individuals. It is not sufficient that one person should observe a phenomenon; repeated experiments are necessary in order to overcome error of manipulation, and to convince others of their correctness. Not only yourself, but many others, after this ma.n.u.script appears, should go through with similar investigations, varied in detail as mind expansion may suggest. This experiment is but the germ of a thought which will be enlarged upon by many minds under other conditions. An event meteorological may occur in the experience of one observer, and never repeat itself. This is possible. The results of such experiments as you are observing, however, must be followed by similar results in the hands of others, and in behalf of science it is necessary that others should be able to verify your experience. In the time to come it will be necessary to support your statements in order to demonstrate that your perceptive faculties are now in a normal condition. Are you sure that your conceptions of these results are justified by normal perception? May you not be in an exalted state of mind that hinders clear perception, and compels you to imagine and accept as fact that which does not exist? Do you see what you think you see? After I am gone, and the influences that my person and mind exert on your own mind have been removed, will these results, as shown by my experiments, follow similar experimental conditions? In the years that are to pa.s.s before this paper is to be made public, it will be your duty to verify your present sense faculty. This you must do as opportunities present, and with different devices, so that no question may arise as to what will follow when others repeat our experiments. To-morrow evening I will call again, but remember, you must not tell others of this experiment, nor show the devices to them.”

[Ill.u.s.tration: FIG. 23. A, brine. B, sand and brine mixed. C, sand and water.]

”I have promised,” I answered.

He gathered his ma.n.u.script and departed, and I sat in meditation watching the mysterious fountain.