Excerpt from History of the Progress and Present State of Animal Chemistry, Vol. 2 of 3 The chemical properties of this fubllance appear to be very fingular, fiuce on the one fide they make it refemble the fixed Oil, and on the other the volatile. It melts at 35??? of Reaumur, which property makes it verv couves nient to convert into candles, the more lo, on account of it's burning with a very clear white flame, without any bad Odour. In North America very large quantities of thelc candles are made. \ve are informed ...
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Excerpt from History of the Progress and Present State of Animal Chemistry, Vol. 2 of 3 The chemical properties of this fubllance appear to be very fingular, fiuce on the one fide they make it refemble the fixed Oil, and on the other the volatile. It melts at 35??? of Reaumur, which property makes it verv couves nient to convert into candles, the more lo, on account of it's burning with a very clear white flame, without any bad Odour. In North America very large quantities of thelc candles are made. \ve are informed by Fourcroy, that a few years ago, Lepefcheux eiiablifbed a manufac tory Of this kind in the Rue l'echiquier, Fauxbourg St. Denis, at Paris; the procefs he makes ufe of confifts in letting the lilh Oil repole in wooden cafks lined with lead, and at the bottom of theic cat 's, mailes of fpermaceti are precipitated, which, previouflv ditlbli'ed in the'animal oil, feparate from it gradually by a real cryftallization. In proportion as this precip1tat1on takes place, the Oil be comes clear, is purified, and much more proper for lamps; when the oil is very clear, it is decanted the fpermaccti taken from the bottom, is proficd in order to feparate a portion ofoil which adheres to it, then melted by a gen tle heat, and fercral times fubmitted to prclltire and in lion, until at length it becomes white, cryllalline, and of a fiber colour. In this (late it is moulded into difibrent kinds of candles, which are of a fplendid whitenefs, and of a much more beautiful tranfparency and brilliancy than wax. They are alfo manufaclured in England. Ex pol'ed to a warm air, fpermaccti becomes yellow and ran cid, but leis eatily than the other concrete fixed Oils. The water in which it has been boiled, on evaporation, gives but a flight mucolo-un???luous refidue. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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