Charles Bonnet

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Bonnet, Charles

(shärl bônā`), 1720–93, Swiss naturalist and philosopher. He drew attention to parthenogenesisparthenogenesis
[Gr.,=virgin birth], in biology, a form of reproduction in which the ovum develops into a new individual without fertilization. Natural parthenogenesis has been observed in many lower animals (it is characteristic of the rotifers), especially insects, e.g.
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 in aphids, but his theories were highly fanciful and unscientific. His books include Traité d'insectologie (1745) and Contemplation de la nature (1764–65).

Bonnet, Charles


Born Mar. 13, 1720, in Geneva; died May 20, 1793, in Geneva. Swiss naturalist and philosopher.

In 1745, in his Treatise on Insects, Bonnet described an-thropoda, polyps, and worms and related new data on the life and instincts of insects. He was one of the first to describe parthenogenesis in plant lice. He observed the process of regeneration in worms, hydras, starfish, snails, crayfish, and amphibians; he expressed the correct hypothesis that regeneration is, in some species of animals, one of the forms of adaptation to the hostile influences of the external environment.

In 1754, in his work An Investigation of the Role of Leaves in Plants, Bonnet tried to explain the physiological functions of the leaf and the movement of plant fluids. In his works Discourse on Organized Bodies (volumes 1–2, 1762), Contemplation of Nature (volumes 1–2, 1764), and Philosophical Palingenesis (volumes 1–2, 1769), Bonnet emerged as a resolute opponent of the theory of spontaneous generation of microorganisms and as a supporter of the theory of preformation. Bonnet was among the authors of studies on the “ladder of beings,” according to which all inorganic bodies and living organisms are distributed in a certain order, from the simplest to the most complex, including man, and extending further to include supernatural beings—angels, archangels, and so on. In questions of epis-temology, Bonnet considered experience and empirics very important, although he also pointed out that human capabilities of perceiving the world are limited.


Lunkevich, V. V. Ot Geraklita do Darvina, 2nd ed., vol. 2. Moscow, 1960. Pages 65–75.
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In addition to providing a case study of a blind poet who suffered from Charles Bonnet syndrome, the book also recounts his own adventures into the inner visual world, including self-induced psychedelic visions of pattern and colours facilitated by LSD and morphine.
Kath said: "He had nightmares and suffered from Charles Bonnet syndrome, which is common for people who have lost their sight and causes hallucinations.
The Swiss archaeologist Professor Charles Bonnet, head of Karma excavations team, told SUNA that the town is built at Doki-gail in north Sudan one kilometer from "Al-Duafoofah" antiquities site (huge buildings made of unbaked bricks dates back to Karma Nubian Kingdom 2500-1450 B.
Next is an article that discusses the impact of anxiety in persons who have visual hallucinations as a result of Charles Bonnet Syndrome, which affects many older individuals with low vision.
Identified over 250 years ago, Charles Bonnet Syndrome (CBS) remains virtually unknown by most physicians.
Jalal Abuthina picked four cases of the Charles Bonnet syndrome and did a re-enactment in front of the camera to show what they might look like.
The visual hallucinations, known as Charles Bonnet Syndrome, often occur but Mrs Roberson was unaware she might develop them.
BERN, Switzerland, September 25 /PRNewswire/ -- The Swiss archaeologist Charles Bonnet spent many years exploring the remains of Nubian civilization in northern Sudan, focusing particular attention on the site of Kerma, the capital of the Nubians, and finding evidence of the existence of a genuine civilization in the region.
This article explores the features of Charles Bonnet syndrome and gives an account of its clinical presentation and the management strategies that should be considered by the practitioner.
Abstract: Introduction: Some persons with Charles Bonnet syndrome (CBS) suffer significant anxiety because of their visual hallucinations, while others do not.
com)-- Often misdiagnosed as a psychiatric disorder, Charles Bonnet Syndrome is characterized by visual hallucinations ranging from simple patterns, faces and landscapes to complex motion pictures of strange and sometimes disturbing scenes.