Zobacz książki o podobnej tematyce

Powiadomienie o dostępności

Więcej informacji o American Edition of the British Encyclopedia, Vol. 10

• Dane szczegółowe
• Opis
• Ulubione w innej kategorii

Opis

Excerpt from American Edition of the British Encyclopedia, Vol. 10: Or Dictionary of Arts and Sciences Comprising an Accurate and Popular View of the Present Improved State of Human Knowledge All combustibles are composed of an incombustible body and phlogiston united; and during the combustion the phlogiston flies off, and the incombustible body is left behind. Thus, when sulphur is burnt, the substance that remains is sulphuric acid, an incombustible body. Sulphur therefore is said to be composed of sulphuric acid and phlogiston. This theory has long since given place to that established by Lavoisier. See Combustion. It must, however, be observed, that Professor Davy, in his late discoveries, seems inclined to admit of an inflammable principle, which pervades the whole of nature. How far his future experiments may lead to the establishment of the Lavoisierian theory, or that of Stahl, time only can show. See Potassium, &c. Phlomis, in botany, a genus of the Didynamia Gymnospermia class and order. Natural order of Verticillatć or Labiatć, Essential character: calyx angular; corolla upper lip incumbent, compressed, villose. There are twenty-two species. Phlox, in botany, a genus of the Pentandria Monogynia class and order. Natural order of Rotaceć. Polemonia, Jussieu. Essential character: corolla salver-shaped; filaments unequal; stigma trifid; calyx prismatical; capsule three-celled, one-seeded. There are twelve species, natives of North America. Phoca, the seal, in natural history, a genus of Mammalia of the order Ferć. Generic character: fore teeth, in the upper jaw, six, sharp, parallel, and the exterior ones larger; in the lower jaw four, distinct, parallel, equal, and rather blunt; tusks one on each side in both jaws, large and pointed, the upper remote from the fore teeth, the lower from the grinders; grinders five on each side above, and six below, tricuspidated. There are nineteen species, of which we shall notice the following: P. vitulina, or the common seal, or sea-calf. These animals are found on the coasts of the polar regions, both to the north and south, often in extreme abundance, and are generally about five feet in length, closely covered with short hair. They swim with great vigour and rapidity, and subsist on various kinds of fish, which they are often observed to pursue within a short distance from the shore. They possess no inconsiderable sagacity, and may, without much difficulty, if taken young, be familiarized to their keepers, and instructed in various gesticulations. They are supposed to attain great longevity. The female is particularly attentive to her young, and scarcely ever produces more than two at a birth, which, after being suckled a fortnight on the shore, where they are always born, are conducted to the water, and taught by their dam the means of defence and subsistence; and when they are fatigued by their excursions, are relieved by being taken on her back. They distinguish her voice, and attend at her call. The flesh of seals is sometimes eaten, but they are almost always destroyed for their oil and skins. The latter are manufactured into very valuable leather, and the former is serviceable in a vast variety of manufactures. A young seal will supply about eight gallons of oil. The smell of these animals, in any great number upon the shore, is highly disagreeable. In the month of October they are generally considered as most valuable, and as they abound in extended caverns on the coast, which are washed by the tide, the hunters proceed to these retreats about midnight, advancing with their boat as far into the recess as they are able, armed with spears and bludgeons, and furnished with torches, to enable them to explore the cavern. They begin their operations by making the most violent noises, which soon rouse the seals from their slumbers, and awaken them to a sense of extreme danger, w

Szczegóły książki

Kategoria Książki po angielsku Mathematics & science Biology, life sciences Zoology & animal sciences

• Pełny tytuł: American Edition of the British Encyclopedia, Vol. 10
• Podtytuł: Or Dictionary of Arts and Sciences Comprising an Accurate and Popular View of the Present Improved State of Human Knowledge (Classic Reprint)
• Autor: William Nicholson
• Język: Angielski
• Oprawa: Miękka
• Liczba stron: 324
• EAN: 9781332234622
• ISBN: 9781332234622
• ID: 09829474
• Wydawca: Forgotten Books
• Waga: 435 g
• Wymiary: 229 × 152 × 17 mm
• Data wydania: 05. August 2015

---

---

---