»This beautiful flower like the structure we see here is composed of myriads of skeletons of little plants like animals of the lowest order. These animals or polyps as they are called consist of a sack or hollow body. At the top is the mouth through which food is drawn in from the water by the aid of a fringe of simple little feelers or arms. These animals are so small that the particles they receive from the water for nourishment are not visible to the naked eye. A polyp washed in the waves of the ocean will attach itself to mud or rock and from the original animal will spring a bud like formation which produces another animal, this process continuing until millions of these forms have accumulated. They crowd together assuming various and beautiful forms branching out on formations like twigs, composed of the minerals they absorb from the sea water. As the animal growth continues the older forms keep dying, leaving only the skeleton upon which the new forms keep building continually. The coral here seen is all skeleton. There is no instinct in a coral polyp which induces it to build other than the instinct of a plant to grow.
Coral varies much in color and shape generally resembling plant forms and comes under two main classifications, that of horny coral and the lime or stone coral. What we see here is called the ?-pores species and is a white coral, almost wholly limestone. The precious coral is the horny and is much used for jewels. It comes in a variety of colors and is capable of receiving a high polish.
Most corals cannot live in water over a few hundred feet in depth and which is cooler than 68 degrees F. Though there are some exceptions, corals are rarely found far from the tropics.«
(auf der Rückseite der Stereokarte, Keystone View Company, um 1900)
Ein stereoskopischer Ein-Blick in die Welt um 1900 … (wird fortgesetzt)
(alle Bildunterschriften und Texte sind den Vorder- bzw. Rückseiten der Stereokarten entnommen)
Private Collection / Private Sammlung
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You’re currently reading “makrofotografische Stereokarten,” an entry on Ortskundeprüfung
- 10. Dezember 2009 / 10:20