Page:Eleven years in the Rocky Mountains and a life on the frontier.djvu/78

houses under water. They do not, as some writers have affirmed, when cutting wood for a dam strip off the bark and store it in their lodges for winter consumption; but only carry under water the stick with the bark on.

"The beaver has two incisors and eight molars in each jaw; and empty hollows where the canine teeth might be. The upper pair of cutting teeth extend far into the jaw, with a curve of rather more than a semicircle; and the lower pair of incisors form rather less than a semicircle. Sometimes, one of these teeth gets broken and then the opposite tooth continues growing until it forms a nearly complete circle. The chewing muscle of the beaver is strengthened by tendons in such a way as to give it great power. But more is needed to enable the beaver to eat wood. The insalivation of the dry food is provided for by the extraordinary size of the salivary glands.

"Now, every part of these instruments is of vital importance to the beavers. The loss of an incisor involves the formation of an obstructive circular tooth; deficiency of saliva renders the food indigestible; and when old age comes and the enamel is worn down faster than it is renewed, the beaver is not longer able to cut branches for its support. Old, feeble and poor, unable to borrow, and ashamed to beg, he steals cuttings, and subjects himself to the penalty assigned to theft. Aged beavers are often found dead with gashes in their bodies, showing that they have been killed by their mates. In the fall of 1864, a very aged beaver was caught in one of the dams of the Esconawba River, and this was the reflection of a great authority on the occasion, one Ah-she-goes, an Ojibwa trapper: 'Had he escaped the trap he would have been killed before the winter was over, by other beavers, for stealing cuttings.'

"When the beavers are about two or three years old, their teeth are in their best condition for cutting. On the Upper Missouri, they cut the cotton tree and the willow bush; around Hudson's Bay and Lake Superior, in addition to the willow they cut the poplar and maple, hemlock, spruce and pine. The cutting is round and round, and deepest upon the side on which they wish the tree to fall. Indians and trappers have seen beavers cutting trees. The felling of a tree is a family affair. No more than a single pair with two or three young ones are engaged at a time. The adults take the cutting in turns, one gnawing and the other watching; and occasionally a youngster trying his incisors. The beaver whilst gnawing sits on his plantigrade hind legs, which keep him conveniently upright. When the tree begins to crackle the beavers work cautiously, and when it crashes down they plunge into the pond, fearful lest the noise should attract an enemy to the spot. After the tree-fall, comes the lopping of the branches. A single tree may be winter provision for a family. Branches five or six inches thick have to be cut into proper lengths for transport, and are then taken home."

The lodge of a beaver is generally about six feet in di-