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When I was his age, Tyndall was the big voice on this subject; yet we have come to think in all humbleness that Tyndall only touched his toes in the stream. The Dakotan has spent the last few years afield. He is a tramp, a solitaire, a student at the sources of life. Things have been made easier for him here.
Professor Tyndall found, in the course of his experiments on the discs and flowers produced in the interior of a mass of ice by sending a warm ray through the mass, that the pieces of ice were in some cases traversed by hazy surfaces of discontinuity, which divided the apparently continuous mass into irregular prismatic segments.
"Get your canoe out, Hartwell," ordered Mr. Tyndall. "This time, when we launch them, we'll make sure that both craft are in good order." When the "Pathfinder" was hauled up on the float she was found to be free from any evidences of trickery. "Now, launch, and we'll watch each canoe until it puts off," announced Mr. Tyndall.
The Gridley visitors would be brutes to try to drag you out to-night. I shan't let you go, and I shall tell the home folks that you're enjoying a well-won rest." "But don't you let any of the Preston High School fellows know how crippled you found us," begged Dave Darrin. "What would you care, if I did?" laughed Mr. Tyndall. "You fellows won the race, didn't you?
But by what process a "vital unit" can be evolved, he does not condescend to tell us. He has no "primordial formless fog" to fall back upon as has Professor Tyndall, nor can he imagine anything beyond the least of possible conceptions in a chemical, morphological, or vital unit.
Professor Tyndall has informed me that in the winters of 1849, 1850, 1851, he found the banks of a river in Germany loaded with massive layers of drift-ice, in a state of thaw, and was struck by the fact that every layer displayed the prismatic structure described above, the axes of the prisms being at right angles to the surfaces of freezing.
These, in the order of their heights, came afterwards, relaxing, as the sunbeams struck each in succession, into a blush and smile. Tyndall holds the mastership of polychromatic description of the beauties of the mountain; he makes us feel his own response to their call to the depths of æsthetic perception in the human soul.
"Well, you'll find them, sooner or later." "Yes, it is the opinion of Dr. Forbes and Mr. Tyndall, that the glacier will sooner or later restore to us the remains of the unfortunate victims." "Without a doubt, without a doubt. And it will be a great thing for Chamonix, in the matter of attracting tourists. You can get up a museum with those remains that will draw!"
His name will always be linked in scientific annals with the names of Young, Davy, Faraday, and Tyndall. And it is worthy such association, for neither in native genius nor in realized accomplishments was Rumford inferior to these successors. Nor is it merely by mutual association with the history of the Royal Institution that these great names are linked.
How full the air may be of these germs was first shown by Professor Tyndall, when he sent a ray of electric light through a dark chamber, and as if by a magician's wand revealed the multitudinous atomic beings which people the air.
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