Assuming the blubber to be the skin of the whale; then, when this skin, as in the case of a very large Sperm Whale, will yield the bulk of one hundred barrels of oil; and, when it is considered that, in quantity, or rather weight, that oil, in its expressed state, is only three fourths, and not the entire substance of the coat; some idea may hence be had of the enormousness of that animated mass, a mere part of whose mere integument yields such a lake of liquid as that. Reckoning ten barrels to the ton, you have ten tons for the net weight of only three quarters of the stuff of the whale’s skin.
In life, the visible surface of the Sperm Whale is not the least among the many marvels he presents.
Chapter 68, The Blanket · verse 5
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