Sea-Weeds, Shells and Fossils (Classic Reprint), by Peter Gray
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Sea-Weeds, Shells and Fossils (Classic Reprint), by Peter Gray
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Excerpt from Sea-Weeds, Shells and FossilsAlgæ, popularly known as sea-weeds, although many species are inhabitants of fresh water, or grow on moist ground, may be briefly described as cellular, flowerless plants, having no proper roots, but imbibing nutrients by their whole surface from the medium in which they grow. As far as has been ascertained, the total number of species is about 9000 or 10,000. Many of them are microscopic, as the Desmids and Diatoms, others, as Lessonia, and some of the larger Laminarise (oarweeds), are arborescent, covering the bed of the sea around the coast with a submarine forest; while in the Pacific, off the northwestern shores of America, Nereocystis, a genus allied to Laminaria, has a stem over 300 feet in length, which, although not thicker than whipcord, is stout enough to moor a bladder, barrel-shaped, six or seven feet long, and crowned with a tuft of fifty leaves or more, each from thirty to forty feet in length. This vegetable buoy is a favourite resting place of the sea otter; and where the plant exists in any quantity, the surface of the sea is rendered impassable to boats. The stem of Macrocystis, which "girds the globe in the southern temperate zone," is stated to extend sometimes to the enormous length of 1500 feet. It is no thicker than the finger anywhere, and the upper branches are as slender as pack-thread; but at the base of each leaf there is placed a buoy, in the shape of a vesicle filled with air.Although the worthlessness of Algæ has been proverbial, as in the "alga inutile" of Horace and Virgil's "projecta vilior alga," they are not without importance in botanical economics. A dozen or more species found in the British seas are made use of, raw or prepared in several ways, as food for man. Of these edible Algæ, Dr. Harvey considers the two species of Porphyra, or laver, the most valuable.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Sea-Weeds, Shells and Fossils (Classic Reprint), by Peter Gray- Published on: 2015-09-27
- Original language: English
- Number of items: 1
- Dimensions: 9.02" h x .29" w x 5.98" l, .42 pounds
- Binding: Paperback
- 134 pages
About the Author Peter Gray is RAeS Senior Research Fellow in Air Power Studies, University of Birmingham, UK.
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Most helpful customer reviews
4 of 4 people found the following review helpful. I enjoyed expanding my horizons and learning a lot about sea-weeds and shells By Ali Julia This book is really two books. One is everything you ever wanted to know about sea weeds, and the second one is about shell collecting.SEA-WEEDThe sea weed book is divided into two section. The first contains a lot information about sea weed. The second half is aimed at the collector of algae. What one needs, where to find it, how best to collect it.Sea weed is a very interesting organism. Sea-weeds is a cellular, flowerless plants, having roots that obtains nutriment by their whole surface from the medium in which they grow. Amazingly, the variety of species is between 9000 and 10,000. They vary from microscopic to huge. For example, the stem of Macrocystis is extends to the enormous length of 1500 feet. They have amazing adaptations, for example, at the base of each leaf of Macrocystic there is a growth that can best described as a buoy, a vesicle filled with air. A dozen or more species, raw or prepared in several ways, are used as food for people. Sea weed contain iodine and is used as medicine.Seaweed classification was devised by Professor Harvey, the names come from the prevailing colour of their spores.1. Chlorospermeæ, with green spores;2. Rhodospermeæ, with red spores; and3. Melanospermeæ, with olive-coloured spores.The book goes into great details about each group of sea weed.The second half of the book addresses of all aspects of collecting, where to find sea-weeds, how to preserve them, what tools will be useful, how to preserve your collection.I never realized there was much to sea-weeds and enjoyed expanding my horizons!SHELL COLLECTINGWho has not collected shells as youngster? This book, however, takes a very serious approach to collecting shells and goes into details on where to find then, identifying them, how to clean them from their dwellers, how to preserve them, how to mount then, how to arrange them. This is a very serious book about shell collecting!I really enjoyed a scientific approach and learned a lot things I did not know before.Ali Julia review
1 of 1 people found the following review helpful. Four Stars By R Lopez Great little pocket reference.
0 of 0 people found the following review helpful. Three Stars By PassionateCoder Have not got into it enough or I may give it higher marks...
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