book i. (folio), chapter i. (sperm whale).—this whale, among the english of old vaguely known as the trumpa whale, and the physeter whale, and the anvil headed whale, is the present cachalot of the french, and the pottsfich of the germans, and the macrocephalus of the long words. he is, without doubt, the largest inhabitant of the globe; the most formidable of all whales to encounter; the most majestic in aspect; and lastly, by far the most valuable in commerce; he being the only creature from which that valuable substance, spermaceti, is obtained. all his peculiarities will, in many other places, be enlarged upon. it is chiefly with his name that i now have to do. philologically considered, it is absurd. some centuries ago, when the sperm whale was almost wholly unknown in his own proper individuality, and when his oil was only accidentally obtained from the stranded fish; in those days spermaceti, it would seem, was popularly supposed to be derived from a creature identical with the one then known in england as the greenland or right whale. it was the idea also, that this same spermaceti was that quickening humor of the greenland whale which the first syllable of the word literally expresses. in those times, also, spermaceti was exceedingly scarce, not being used for light, but only as an ointment and medicament. it was only to be had from the druggists as you nowadays buy an ounce of rhubarb. when, as i opine, in the course of time, the true nature of spermaceti became known, its original name was still retained by the dealers; no doubt to enhance its value by a notion so strangely significant of its scarcity. and so the appellation must at last have come to be bestowed upon the whale from which this spermaceti was really derived.