Seal oil

“ Neatsfoot-oil is produced by boiling the feet of cattle. Sperm-oil and other fish-oils are obtained from different varieties of fish and sea animals, as the whale, seal, cod, shark or herring. The uses of the different oils are very numerous: as food and in the preparation of food, in soap-making, painting, machinery and in a thousand other ways they are of great importance. There is a large class of substances known as the essential or volatile oils which resemble the fats somewhat in their properties, particularly in not mixing with water. ”

“ To prevent adulteration, the Astral Oil is packed only in the Guaranty Patent Cans, of 1 gallon and 5 gallons each, and each can is sealed in a manner that cannot be counterfeited Every package, with uncut seal, we warrant. The universal testimony of consumers is that the "Astral" Oil is perfect; a single trial serves to establish it in the family. ”

“ The oil, then, by its own outspreading, extending over the waves, forms a film of less than a two and a half millionth part of an inch in thickness; and this is enough to reduce breaking waves and dangerous "rollers" to unbroken undulations that are practically harmless. The oils that have been found most effective are seal, porpoise, and fish oils. Mineral oils, such as are used for illumination, are too light ”

“ The native women must have a mixture of oils from the seal, walrus and narwhal. Walrus and seal blubber is frozen, cut into strips, and pounded with great force so as to break the fat cells. This mass is now placed in a stone pot and heated to the temperature of the igloo, when the oil slowly separates from the fibrous pork-like mass. Now, tallow from the suet of the reindeer or musk ox is secured, cut into blocks and given by the good housewife to her daughters, who sit in the igloo industriously chewing it until the fat cells are crushed. ”

“ The oil obtained from the seals is as valuable as that got from the arctic whales, whilst their skins are also of some commercial importance. It was a happy circumstance that just as whale-fishing began to fall off, gas as an illuminant became common; and although train and sperm oils are still used in various manufactories, and especially in jute-mills, the mineral oils which have been found in such quantity have doubtless served many of the purposes for which whale-oil was at one time in constant demand. ”

“ They are viscid and of a pale yellow color, lighter than water, and therefore float upon it, and are very combustible. Oils are used for a multiplicity of purposes: for burning in lamps, for making paints and varnishes, preventing the friction of machinery, in making soap, and numerous other processes. Oils are generally divided into fixed and volatile oils; as an example of the first, linseed oil may be selected; of the last, oil of lavender.
Some of the fixed oils are called drying oils, and it is this kind that are used for varnish making ”

“ Others are deprived of a part of their more volatile constituents by spontaneous evaporation, or by distillation, in vacuo or otherwise, at the lowest possible temperature. Such are known as “reduced oils”.
In most petroleum-producing countries, however, and particularly where the product is abundant, the crude oil is fractionally distilled, so as to separate it into petroleum spirit of various grades, burning oils, gas oils, lubricating oils, and (if the crude oil yields that product) paraffin. ”

“ The local cheapness of labour is an additional argument in favour of preparing the oil at the places where the nut grows. The extraction of the oil is very simple. In Jamaica, Polynesia, and the East Indies, 50 per cent. is obtained by boiling the kernels in water; by reducing the kernels to meal, heating in a water-bath, and placing the mass in bags under hydraulic pressure, the yield is about 60-66 per cent. The shells are themselves excellent fuel. The oil is completely clarified by mere filtration. ”

“ It is a good practice to pour into the pot a quantity of water, so that the oil may be lifted from the bottom of it, as all the impurities of the oil sink into the water, and do not again mix when it is stirred. When of the consistency above mentioned, the oil is separated from the water, and being put into a bottle, is subjected to heat till it becomes fluid again, when all remaining impurities will sink, and the oil, being carefully poured off from the sediment, forms what is termed "fat oil." ”

“ But in that year Mr Young, a chemist at Manchester, discovered that by distilling some petroleum, which he obtained from a spring at Riddings in Derbyshire, he was able to procure a light oil, which he used for burning in lamps, whilst the heavier product which he also obtained proved a most useful lubricant for machinery. This naturally distilled oil was soon found to be similar to that oil which was noticed dripping from the roof of a coal-mine. ”

“ Some of the oils produced are of excellent quality, but others are inferior, and do not ascend the wick in sufficient quantity to afford a constant light. None of the native petroleums contain carbolic acid and other impurities which exist in the oils distilled from coals and shales; hence their purification is simple and comparatively cheap. “The oil prepared1143 from petroleum is almost colourless; it has a specific gravity of about ·810, and when of good quality only a slight and rather aromatic odour.” (Payen.) See Petroleum, and above. ”

“ The refining of crude oil as it is produced from the earth, consists in the classification of its various hydrocarbons by means of fractional distillation, into the various products which so largely enter into our commercial and domestic life of to-day. The refined products, in the order in which they are received by distillation, are: motor spirit, illuminating oils, solar oils, lubricating oils, fuel oils, residuum, etc.—the first mentioned being the lightest and the last the heaviest in specific gravity. ”

“ The oil is violently agitated along with 11⁄2 to 2% of concentrated sulphuric acid, when it assumes a greenish colour, and, after about a fortnight’s repose, deposits much colouring matter, becomes paler, and burns with greater brilliancy, particularly if well washed with steam or hot water, and clarified by subsequent repose or by filtration. This answers well for most of the recently expressed vegetable oils. It also greatly improves most of the fish oils. ”

“ This is easily done by impregnating the water with a proper quantity of Sea-salt, or the Vitriolic Acid; for, the more saline matters are contained in water, the more will the degree of heat it acquires, by being brought to boil, exceed that of pure boiling water.
Fifthly, Essential Oils differ from one another in point of fluidity. Some are as thin and as fluid as Spirit of Wine: of this number is the Essential Oil of Turpentine. Others, again, are thick, and even congeal as they cool: such, for instance, is the Oil of Roses. ”

“ The fixed oils, except where otherwise directed, are obtained from the bruised or ground fruit or seed, by means of powerful pressure, in screw or hydraulic presses, and are then either allowed to clarify themselves by subsidence or are filtered. Both methods are frequently applied to the same oil. In some cases the impurities are removed by ebullition with water, and subsequent separation of the pure oil. Heat is frequently employed to increase the liquidity of the oil, and thus lessen the difficulty of its expulsion from the mass. ”

“ The stearessence of anise-seed oil absorbed at its liquefying temperature, in the space of two years, 156 times its volume of oxygen gas, and disengaged 26 times its volume of carbonic acid gas. An oil which has begun to experience such an oxidizement is composed of a resin dissolved in the unaltered oil; and the oil may be separated by distilling the solution along with water. To preserve oils in an unchanged state, they must be put in phials, filled to the top, closed with ground glass stopples, and placed in the dark. ”

“ Agitation along with animal charcoal will restore their clearness and original colour, but nothing more.
Pur., Tests. The essential or volatile oils of commerce are very frequently adulterated with the fatty oils, resins, spermaceti, or alcohol, or with other essential oils of a cheaper kind or lower grade. The presence of the first three of these may be readily detected by placing a drop of the suspected oil on a piece of white paper, and exposing it for a short time to heat. If the oil is pure, it will entirely evaporate ”

“ The raw petroleum of different localities differs in each case in the amount of solid paraffins and olefines dissolved in the liquid paraffins. Other substances also are dissolved in it in variable amount—such as benzene, acetylene, camphene and naphthalene. The fact that the oil, when reached by a boring, is often found to be under a considerable pressure, so that it rises and flows from the surface of the well, or even may shoot up as a great fountain, is an important feature in the oil-seeking industry, though the supply depends largely on pumping and not necessarily on natural flow. ”

“ The resinifying or drying property of oils is greatly increased by boiling them, either alone or along with some litharge, sugar of lead, or white vitriol, when the product forms the ‘boiled oil’ or ‘drying oil’ (oleum desiccativum) of commerce. The efficacy of the process, according to Liebig, depends on the elimination of substances which impede the oxidation of the oil. The following formulæ are adopted for this purpose:—
1. Linseed oil, 1 gall.; powdered litharge, 3⁄4 lb.; simmer, with frequent stirring, until a pellicle begins to form ”

“ The oils most proper to be used are linseed, rapeseed, or almost any of the vegetable fixed oils. Oak wood, rendered entirely free from moisture, and then immersed in linseed oil, is said to be thus prevented from splitting: the time of immersion depending on the size, &c. Palm oil is preferable to whale oil, because impregnation with the latter, although in many instances eligible, causes [107] wood to become brittle. It is, however, probable that whale oil, when combined with other substances, such as litharge, coal pitch, or charcoal, may lose much of that effect. ”

“ Petroleum has largely superseded other oils, and is still gaining ground, as a lubricant for machinery and railway rolling-stock, either alone or in admixture with fixed oils. The more viscous descriptions of mineral oils have also been found suitable for use in the Elmore process of ore-concentration by oil. ”

“ We may obtain oil from such material, but it is utterly different from any kind of mineral oil, while, on the other hand, by distilling natural bituminous shales, or cannel coal, or peat, we obtain a crude oil almost identical with natural petroleum, and the little difference between the two is perfectly accounted for by the greater rapidity of our methods of distillation as compared with the slow natural process. We may go on approximating more and more nearly to the natural petroleum by distilling more and more slowly. ”

“ This depends on the place of growth, the age, and the manner of pressing. If, however, any oil be examined comparatively with a perfectly pure one, the proof of adulteration may be rendered, if not certain, at least probable, by noting the difference. Thus I obtained, by adding 1 part of either whale-train, or linseed oil, or oleic acid, or 10 parts of rapeseed oil, the following results:—
“The adulteration being ascertained as far as is possible, the oil is then tested by endeavouring to discover the adulterating oil, either by reagents or by its odour when gently heated, as before described. ”

“ Coal oil, or petroleum, sometimes found oozing from crevices in rocks, or even floating on water, is a natural inflammable oil stored in the earth. It was known in ancient Persia, Greece, and Rome, but did not become of great commercial importance until the middle of the nineteenth century. It is now obtained by boring wells, and is found in great quantities in certain regions of the country. The crude oil yields many products valuable in the arts, medicine, and manufacture. Kerosene is the substance useful as a fuel and for giving light. ”

“ Other oils do not grow dry, though they turn thick, become less combustible, and assume an offensive smell. They are then called rancid. In this state, they exhibit an acid reaction, and irritate the fauces when swallowed, in consequence of the presence of a peculiar acid, which may be removed in a great measure by boiling the oil along with water and a little common magnesia for a quarter of an hour, or till it has lost the property of reddening litmus. While oils undergo the above changes, they absorb a quantity of oxygen equal to several times their volume. ”

“ Of this vast quantity, by far the largest proportion is consumed as illuminating oil, or kerosene, for the production of which a stream of oil is constantly flowing through six-inch pipes from the oil-region of Western Pennsylvania to Baltimore, Philadelphia, and Jersey City. In each of these cities establishments, constructed for the purpose, convert the crude oil into various products, principally illuminating oil, for the home market and an export trade of vast proportions. ”

“ Edward Orton, of Ohio, was the most prominent investigator in this field. In all regions where petroleum occurs the strata are not only disturbed, but they are bent into anticlinal or arch-shaped folds. If the rocks are porous the gas tends to collect at the summit of the anticlinal fold or arch, while the oil collects in the flanks of the fold. Salt water is usually associated with the gas and oil, and, being heavier, accumulates in the flanks of the anticlinal or in the neighboring synclinal folds. There is little use of searching for oil in regions where the strata are flat ”