This substance is a secretion obtained from several different animals,

notably the otter and muskrat. The glands which contain it are

located similarly to the castor glands of the beaver, and the musk

should be discharged into a vial, as previously described. The

musk of the female muskrat is said to be the most powerful, and

is chiefly used by trappers in the capture of that animal, the

otter being chiefly attracted by its own musk.