Issue 24 and Volume 36.

A BEAVER DAM. A beaver dam in the valley of the Dead river, Maine, is a remarkable piece of hydraulic engineering. It has been built across a sluggish stream, a tributary of the Dead river, which is itself sluggish enough at certain seasons of the year. The dam is now over 100 feet from side to side, whereas only a few years ago it was barely seventy-five feet 111 width, so that it is probable that this particular colony is growing and gaining at such a rate that a larger area of water was necessary to keep peace with the demands for food and homes. The dam is in perfect repair. There is no work in process of erection, and everything is complete. Trees from twelve to eighteen inches in diameter are readily used for the work, and it would seem that experienced woodsmen could not cut out and remove…

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