mickle
innit
- Location
- 53.933606, -1.076131
An oil is a substance that is in a viscous liquid state ("oily") at ambient temperatures or slightly warmer, and is both hydrophobic (immiscible with water) and lipophilic (miscible with other oils, literally). This general definition includes compound classes with otherwise unrelated chemical structures, properties, and uses, including vegetable oils, petrochemical oils, and volatile essential oils. Oil is a nonpolar substance.
The term oil is often used colloquially to refer to petroleum.
Types of oils
Mineral oil
All oils, with their high carbon and hydrogen content, can be traced back to organic sources. Mineral oils, found in porous rocks underground, are no exception, as they were originally the organic material, such as dead plankton, accumulated on the seafloor in geologically ancient times. Through various geochemical processes this material was converted to mineral oil, or petroleum, and its components, such as kerosene, paraffin waxes, gasoline, diesel and such. These are classified as mineral oils as they do not have an organic origin on human timescales, and are instead derived from underground geologic locations, ranging from rocks, to underground traps, to sands.
Other oily substances can also be found in the environment, the most well-known being asphalt, occurring naturally underground or, where there are leaks, in tar pits.
Petroleum and other mineral oils, (specifically labelled as petrochemicals), have become such a crucial resource to human civilization in modern times they are often referred to by the ubiquitous term of "oil" itself.
Organic oil
Oils are also produced by plants, animals and other organisms through organic processes, and these oils are remarkable in their diversity. Oil is a somewhat vague term to use chemically, and the scientific term for oils, fats, waxes, cholesterol and other oily substances found in living things and their secretions, is lipids.
Lipids, ranging from waxes to steroids, are somewhat hard to characterize, and are united in a group almost solely based on the fact that they all repel, or refuse to dissolve, in water, and are however comfortably miscible in other liquid lipids. They also have a high carbon and hydrogen content, and are considerably lacking in oxygen compared to other organic compounds and minerals.
(Manna Oil of Saints).
An oily substance, which is said to have flowed, or still flows, from the relics or burial places of certain saints; sometimes the oil in the lamps that burn before their shrines; also the water that flows from the wells near their burial places; or the oil and the water which have in some way come in contact with their relics. These oils are or have been used by the faithful, with the belief that they will cure bodily and spiritual ailments, not through any intrinsic power of their own, but through the intercession of the saints with whom the oils have some connection. In the days of the St. Paulinus of Nola (d. 431) the custom prevailed of pouring oil over the relics or reliquaries of martyrs and then gathering it in vases, sponges, or pieces of cloth. This oil, oleum martyris, was distributed among the faithful as a remedy against sickness ["Paulini Nolani Carmen," XVIII, lines 38-40 and "Carmen," XXI, lines 590-600, in "Corpus Script. Eccl. Latinorum" (Vienna, 1866 sq.), XXX, 98, 177]. According to the testimony of Paulinus of Pétrigeux (wrote about 470) in Gaul this custom was extended also to the relics of saints that did not die as martyrs, especially to the relics of St. Martin of Tours ("Paulini Petricordiæ Carmen de vita S. Martini," V, 101 sq. in "Corpus Script. Eccl. Lat.," XVI, 111). In their accounts of miracles, wrought through the application of oils of saints, the early ecclesiastical writers do not always state just what kind of oils of saints is meant. Thus St. Augustine ("De Civitate Dei," XXII) mentions that a dead man was brought to life by the agency of the oil of St. Stephen.
The Oil of St. Walburga
At present the most famous of the oils of saints is the Oil of St. Walburga (Walburgis oleum). It flows from the stone slab and the surrounding metal plate on which rest the relics of St. Walburga in her church in Eichstädt in Bavaria. The fluid is caught in a silver cup, placed beneath the slab for that purpose, and is distributed among the faithful in small vials by the Sisters of St. Benedict, to whom the church belongs. A chemical analysis has shown that the fluid contains nothing but the ingredients of water. Though the origin of the fluid is probably due to natural causes, the fact that it came in contact with the relics of the saint justifies the practice of using it as a remedy against diseases of the body and the soul. Mention of the oil of St. Walburga is made as early as the ninth century by her biographer Wolfhard of Herrieden ("Acta SS.," Feb., III, 562-3 and "Mon. Germ. Script.," XV, 535 sq.).
The Oil of St. Menas
In 1905-8, thousands of little flasks with the inscription: EULOGIA TOU AGIOU MENA (Remembrance of St. Menas), or the like were excavated by C.M. Kaufmann at Baumma (Karm Abum) in the desert of Mareotis, in the northern part of the Libyan desert. The present Bumma is the burial place of the Libyan martyr Menas, which during the fifth and perhaps the sixth century was one of the most famous pilgrimage places in the Christian world. The flasks of St. Menas were well known for a long time to archeologists, and had been found not only in Africa, but also in Spain, Italy, Dalmatia, France, and Russia, whither they had been brought by pilgrims from the shrine of Menas. Until the discoveries of Kaufmann, however, the flasks were supposed to have contained oil from the lamps that burned at the sepulchre of Menas. From various inscriptions on the flasks that were excavated by Kaufmann, it is certain that at least some, if not all, of them contained water from a holy well near the shrine of St. Menas, and were given as remembrances to the pilgrims. The so-called oil of St. Menas was therefore in reality, water from his holy well, which was used as a remedy against bodily and spiritual ailments.
The Oil of St. Nicholas of Myra
This is the fluid which emanates from his relics at Bari in Italy, whither they were brought in 1087. It is said to have also flowed from his relics when they were still in Myra.
The term oil is often used colloquially to refer to petroleum.
Types of oils
Mineral oil
All oils, with their high carbon and hydrogen content, can be traced back to organic sources. Mineral oils, found in porous rocks underground, are no exception, as they were originally the organic material, such as dead plankton, accumulated on the seafloor in geologically ancient times. Through various geochemical processes this material was converted to mineral oil, or petroleum, and its components, such as kerosene, paraffin waxes, gasoline, diesel and such. These are classified as mineral oils as they do not have an organic origin on human timescales, and are instead derived from underground geologic locations, ranging from rocks, to underground traps, to sands.
Other oily substances can also be found in the environment, the most well-known being asphalt, occurring naturally underground or, where there are leaks, in tar pits.
Petroleum and other mineral oils, (specifically labelled as petrochemicals), have become such a crucial resource to human civilization in modern times they are often referred to by the ubiquitous term of "oil" itself.
Organic oil
Oils are also produced by plants, animals and other organisms through organic processes, and these oils are remarkable in their diversity. Oil is a somewhat vague term to use chemically, and the scientific term for oils, fats, waxes, cholesterol and other oily substances found in living things and their secretions, is lipids.
Lipids, ranging from waxes to steroids, are somewhat hard to characterize, and are united in a group almost solely based on the fact that they all repel, or refuse to dissolve, in water, and are however comfortably miscible in other liquid lipids. They also have a high carbon and hydrogen content, and are considerably lacking in oxygen compared to other organic compounds and minerals.
(Manna Oil of Saints).
An oily substance, which is said to have flowed, or still flows, from the relics or burial places of certain saints; sometimes the oil in the lamps that burn before their shrines; also the water that flows from the wells near their burial places; or the oil and the water which have in some way come in contact with their relics. These oils are or have been used by the faithful, with the belief that they will cure bodily and spiritual ailments, not through any intrinsic power of their own, but through the intercession of the saints with whom the oils have some connection. In the days of the St. Paulinus of Nola (d. 431) the custom prevailed of pouring oil over the relics or reliquaries of martyrs and then gathering it in vases, sponges, or pieces of cloth. This oil, oleum martyris, was distributed among the faithful as a remedy against sickness ["Paulini Nolani Carmen," XVIII, lines 38-40 and "Carmen," XXI, lines 590-600, in "Corpus Script. Eccl. Latinorum" (Vienna, 1866 sq.), XXX, 98, 177]. According to the testimony of Paulinus of Pétrigeux (wrote about 470) in Gaul this custom was extended also to the relics of saints that did not die as martyrs, especially to the relics of St. Martin of Tours ("Paulini Petricordiæ Carmen de vita S. Martini," V, 101 sq. in "Corpus Script. Eccl. Lat.," XVI, 111). In their accounts of miracles, wrought through the application of oils of saints, the early ecclesiastical writers do not always state just what kind of oils of saints is meant. Thus St. Augustine ("De Civitate Dei," XXII) mentions that a dead man was brought to life by the agency of the oil of St. Stephen.
The Oil of St. Walburga
At present the most famous of the oils of saints is the Oil of St. Walburga (Walburgis oleum). It flows from the stone slab and the surrounding metal plate on which rest the relics of St. Walburga in her church in Eichstädt in Bavaria. The fluid is caught in a silver cup, placed beneath the slab for that purpose, and is distributed among the faithful in small vials by the Sisters of St. Benedict, to whom the church belongs. A chemical analysis has shown that the fluid contains nothing but the ingredients of water. Though the origin of the fluid is probably due to natural causes, the fact that it came in contact with the relics of the saint justifies the practice of using it as a remedy against diseases of the body and the soul. Mention of the oil of St. Walburga is made as early as the ninth century by her biographer Wolfhard of Herrieden ("Acta SS.," Feb., III, 562-3 and "Mon. Germ. Script.," XV, 535 sq.).
The Oil of St. Menas
In 1905-8, thousands of little flasks with the inscription: EULOGIA TOU AGIOU MENA (Remembrance of St. Menas), or the like were excavated by C.M. Kaufmann at Baumma (Karm Abum) in the desert of Mareotis, in the northern part of the Libyan desert. The present Bumma is the burial place of the Libyan martyr Menas, which during the fifth and perhaps the sixth century was one of the most famous pilgrimage places in the Christian world. The flasks of St. Menas were well known for a long time to archeologists, and had been found not only in Africa, but also in Spain, Italy, Dalmatia, France, and Russia, whither they had been brought by pilgrims from the shrine of Menas. Until the discoveries of Kaufmann, however, the flasks were supposed to have contained oil from the lamps that burned at the sepulchre of Menas. From various inscriptions on the flasks that were excavated by Kaufmann, it is certain that at least some, if not all, of them contained water from a holy well near the shrine of St. Menas, and were given as remembrances to the pilgrims. The so-called oil of St. Menas was therefore in reality, water from his holy well, which was used as a remedy against bodily and spiritual ailments.
The Oil of St. Nicholas of Myra
This is the fluid which emanates from his relics at Bari in Italy, whither they were brought in 1087. It is said to have also flowed from his relics when they were still in Myra.
