The white and fatty substance known in our shops by the name of _spermaceti_ is found in an immense cavity of the skull, distinct from that which contains the brain. This sometimes occupies nearly the whole front and upper part of the head, and, in some instances, is known to measure sixteen or eighteen feet in length. It is divided horizontally into two parts by a strong membrane, and each of these parts is again subdivided, by vertical membranes, into numerous cells, which communicate with each other, and contain the spermaceti. This, which is frequently mistaken for the brain, is sometimes found in such quantity as to fill eighteen or twenty butts. Whilst the animals are alive, the spermaceti is in a fluid state; but, when dead, it is found in somewhat solid lumps, and is of whitish colour. Spermaceti is of considerable use, medicinally, in pains and erosions of the intestines, in coughs, and other complaints. It is also applied externally in ointments, and for other purposes. It is converted into a very beautiful kind of candles, which appear to be a medium between those made of wax and tallow. Good spermaceti is in fine white flakes, glossy, and semi-transparent, soft, and unctuous to the touch, yet dry and easily friable, in taste somewhat like butter, and of faint smell, not much unlike that of tallow. If exposed to the air, it soon becomes rancid and yellow. Its quality and colour may however be recovered by steeping it in alkaline liquors, or in a sufficient quantity of spirit of wine. The _flesh_ of this kind of whale is of pale red colour, appears not much unlike coarse pork, and is not unpalatable as food. The _skin_, _intestines_, and _tendons_, are all useful to the inhabitants of the northern countries of Europe. The _tongue_ is considered excellent eating. The _teeth_ are formed into the heads of spears and arrows, and may even be used as ivory; the _bones_ are sometimes applied as timber for tents and cottages; and a very tenacious glue or size is manufactured from the _fibres of the flesh_.