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Among these may be found in the south-west chain, masses of trap, breccia, wacke, porphyry, &c.; and in the inland parallel chain, splendid specimens of coralline schist, agate, jasper, chalcedony, amydoloid, cornelian, and silicified wood are to be met with, of which I need only raise my eyes to those collected before me to say how beautiful they are.

Thus silicified wood is often as hard and solid as agate, and under the microscope we see that the wood has entirely perished, and is represented by silica or flint, differing merely in colour from that which fills the cavities.

It is an interesting fact that the silicified wood of the Irawadi should have attracted attention more than one hundred years ago.

R., silicified wood of, noticed in 1692, 28.Ireland, raised beaches on coast of, 122.——, reptiles of, 645.——, peat of, and fossils in, 719, 720, 724——, deposits in progress off coast of, 774.Iron, melting point of, 539.——, in wood, peat, &c.,

The tiponi is a ceremonial object about 18 inches long, consisting of feathers set upright around a small disk of silicified wood, which serves as its base when set upon the altar.