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The name ambergris is derived from the Spanish "ambar gris"., ambarmeaning amber and gris meaning grey, thus the name signifies grey amber.The use of ambergris in Europe is now entirely confined to perfumery-as a material of perfumery. Its high price varies from $15 to$25 an ounce, though it formerly occupied on inconsiderable place in medicine. Ambergris was also decorated and worn as jewelry, particularly during the Renaissance. It occupies a very important place in the perfumery of the East, and there it is also used in pharmacy, and as a fiavouring material in cookery.

Amber, however, is quite a different substance from ambergris and this discrepancy has puzzled some people. Amber is the fossilised resin from trees that was quite familiar to Europeans long before the discovery of the New World.and prized for iewelry. Although considered a gem, amber is a hard, transparent.wholly-organic material derived from the resin of extinct species of trees. In the dense forests of the Middle Cretaceous and Tertiary periods, between 10 and 100 million years ago, these resin-bearing trees fell and were carried by rivers to coastal regions. There, the trees and their resins became covered with sediment.and over millions of years the resin hardened into amber.Ambergris and amber are related by the fact that both wash up on beaches. Ambergris is a solid, waxy, flammable substance of a dull grey on blackish colour, with the shades being variegated like marble. It possesses a peculiar sweet, earthy odour not unlike isopropyl alcohol. It is now known to be a morbid secretion formed in the intestines of the sperm whale, found in the Atlantic and Pacific oceans. Being a very lightweight material, ambergris is found floating upon the sea, on the sea-coast, or in the sand near thesea-coast. It is met with in the Atlantic Ocean, on the coasts of Brazil and Madagascar: also on the coast of Africa, of the East Indies, China, Japan, and the Molucca lslands: but most of the ambergris which is brought to England comes from the Bahama Isiands. It is also sometimes found in the abdomen of whales, always in lumps in various shapes and sizes, weighing from 1/2 oz. to 100 or more lb. A piece which the Dutch East India Company bought from the King of Tydore weiahed 182 Ib. An American fisherman from Antigua found, inside a whale, about 52 leagues south-east from the Windward Islands, a piece of ambergris which weighed about 130 Ib, anc sold for 500 sterling.Like many other substances regarding the origin of which there existed some obscurity or mystery, amberaris in former times possessed a value, and had properties attributed to it, more on account of the source from which it was drawn than from its inherent qualities. Many ridiculous hypotheses were started to account for its origin, and among others it was conjectured to be the solidified foam of the sea, a fungous growth in the ocean similar to the fungi which form on trees.

The true source and character of amberaris was first satisfactorily establisheo by Dr. Swediaur in a communication to the Royal Society. It was found by Dr Swediaur that ambergris very frequently contained the horny mandibles or beaks of the squid, on which the sperm whales are known to feed. That observation, in connection with the fact of ambergris being frequently taken from the intestines of the sperm whale, sufficiently proved that the substance is produced by the whale's intestine as a means of facilitating the passage of undigested hard, sharp beaks of squid that the whale has eaten.It was further observed that the whales in which ambergris was found were either dead or much wasted and evidently in a sickly condition. From this it was inferred that ambergris is in some way connected with a morbid condition of the sperm whale. Often expelled by vomiting, ambergris floats in chunks on the water and is of a deep grey colour, soft consistence, and an offensive, disagreeable smell. Following months to years of photo degradation and oxidation in the ocean, this precursor gradually hardens.developing a dark grey or black colour, a crusty and waxy texture, and apeculiar odour that is at once sweet, earthy, marine, and animalist. Its smel has been described by many as a vastly richer and smoother version of isopropanol without its stinging harshness.In that condition its specific gravity ranges from 0.780 to 0.926. It melts at a temperature of about 145 F into a fatty yellow resin-like liquid. It is soluble in ether, volatile and fixed oils, but only feebly acted on by acids. By digesting in hot alcohol, a peculiar substance termed ambrein is obtained. Ir chemical constitution ambrein very closely resembles cholesterin, a principle found abundantly in biliary calculi. It is therefore more than probable that ambergris, from the position in which it is found and its chemical constitution, is a biliary concretion analogous to what is formed in other mammals.

The industries founded on ambergris resulted in the slaughter of sperm whales almost to extinction. Sperm whales were killed in two massive hunts.the Moby Dick whalers who worked mainly between 1740-1880, and the modern whalers whose operations peaked in 1964, when 29,255 were killed.Most recent estimates suggest a global population of about 360,000 animals down from about 1,100,000 before whaling. In the 20th century, 90% of ambergris was derived in the processing of killing sperm whales. To this day ambergris is still the most expensive product in the whole body of sperm whale. Depending on its quality, raw ambergris fetches approximately 20 USD per gram. In the United States, possession of any part of an endangered species-including ambergris that has washed ashore- is a violation of the Endangered Species Act of 1978.Historically, the primary commercial use of ambergris has been in fragrance chemistry. However, it is difficult to get a consistent and reliable supply of high quality ambergris. Due to demand for ambergris and its high price, replacement compounds have been sought out by the fragrance industry and chemically synthesised. The most important of these is Ambrox, which has taken its place as the most widely used amber odorant in perfume manufacture. Procedures for the microbial production of Ambrox have also been devised.

雅思阅读真题题目：

Questions 1-8

Classify the following statements as applying to

A Ambergris only

B Amber only

C Both amber and ambergris

D Neither amber nor ambergris

Write the correct letter. A. B, Cor D, in boxes 1-8 on your answer sheet.

1 from plant

2 from anima

3 much lighter

4 very costly

5 used in medicine

6 used as currency

7 wash up on beaches

8 could be seen through

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