From head matter, by filtering through flannel, or felt. The finer kinds of whale and seal oils, forced through animal charcoal, are sold for it, used for chamber lamps, burning with but little smell; 5s. the gallon.(1)
Note
1. The sperm whale or cachelot (Physeter macrocephalus).
Source
Samuel Frederic Gray. A supplement to the Pharmacopoeia being a complete dispensatory and manual for medical practitioners and retail druggists. London, 1831.
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