Gravitation is a great power, but the thousand tons of this tree's vast weight must be lifted and sustained in defiance of it. So for a thousand years gravitation sees the tree rise higher and higher, till the great lesson is taught that it is a weakling compared with the power of life. There is not a place where one can put his finger that there are not a dozen forces in full play, every one of which is plastic, elastic, and ready to yield to any force that is higher. So the tree stands, not mere lumber and cordwood, or an obstacle to be gotten rid of by fire, but an embodiment of life unexhausted for a thousand years. The fairy-fingered breeze plays through its myriad harp strings. It makes wide miles of air aromatic. Animal life feeds on the quintessence of life in its seeds. But most of all it is an object lesson that power triumphs over lesser power, and that the highest power has dominion over all other power. The great power of vegetable life was shown under circumstances that seemed the least favorable in the following experiment: In the Agricultural College at Amherst, Mass., a squash of the yellow Chili variety was put in harness in 1874 to see how much it would lift by its power of growth. [Illustration: Yellow Chili Squash in Harness.] It was not an oak or mahogany tree, but a soft, pulpy, squashy squash that one could poke his finger into, nourished through a soft, succulent vine that one could mash between finger and thumb. A good idea of the harness is given by the illustration. The squash was confined in an open harness of iron and wood, and the amount lifted was indicated by weights on the lever over the top. There were, including seventy nodal roots, more than eighty thousand feet of roots and rootlets. These roots increased one thousand feet in twenty-four hours. They were afforded every advantage by being grown in a hot bed. On August 21 it lifted sixty pounds. By September 30 it lifted a ton. On October 24 it carried over two tons. The squash grew gnarled like an oak, and its substance was almost as compact as mahogany. Its inner cavity was very small, but it perfectly elaborated its seeds, as usual. The lever to indicate the weight had to be changed for stronger ones from time to time. More weights were sought. They scurried through the town and got an anvil and pieces of railroad iron and hung them at varying distances, as shown in the cut. By the 31st of October it was carrying a weight of five thousand pounds. Then owing to defects of the new contrivance the rind was broken through without showing what might have been done under better conditions. Every particle of the squash had to be added and find itself elbow room under this enormous pressure. But life will assert itself. [Illustration: Squash in Cage.]