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Louis-Félix Henneguy

Louis-Félix Henneguy is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Louis-Félix Henneguy rather than just read about it. In short: Louis-Félix Henneguy (18 March 1850 – 16 January 1928) was a French zoologist and embryologist born in Paris. In 1875, he received his medical doctorate from the University of Montpellier with a dissertation on the physiological action of poisons, Étude physiologique sur l'action des poisons.

Louis-Félix Henneguy — main illustration
Louis-Félix Henneguy — illustration

Key takeaways

  • Louis-Félix Henneguy belongs to astronomy; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Louis-Félix Henneguy to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Louis-Félix Henneguy from memory before moving on to harder problems.

Reference excerpt

Louis-Félix Henneguy (18 March 1850 – 16 January 1928) was a French zoologist and embryologist born in Paris. In 1875, he received his medical doctorate from the University of Montpellier with a dissertation on the physiological action of poisons, Étude physiologique sur l'action des poisons. In 1883 he obtained his agrégation with Les lichens utiles, a thesis on useful lichens. During his career he was a professor of comparative embryology at the Collège de France (1900–28), and a member of the Académie de Médecine, the Académie d'Agriculture and the Académie des sciences (1908–28). From 1894 he was director of the journal, Archives d'anatomie microscopique. He is known for his extensive research of phylloxera, publishing a number of papers on means of destroying its eggs during the winter (1885, 1887–88). Also he performed studies on the natural history of the apple blossom weevil, proposing methods for its eradication (1891). On behalf of the Marine Fisheries Advisory Committee, he did reviews involving the sale and consumption of mussels throughout the year. With Hungarian neuroanatomist, Mihály Lenhossék (1863–1937), the "Henneguy–Lenhossek theory" is named, which states the claim that mitotic centrioles and ciliary basal kinetosomes are fundamentally the same structure. As a taxonomist he circumscribed the apicomplexan genus Rhytidocystis, and the protozoan genera Thelohania and Fabrea. The genus Henneguya Thélohan, 1892 is named after him, as are the species Apherusa henneguyi Chevreux & Fage, 1925 and Ectinosoma henneguyi Labbé, 1926. In 1903 he was appointed president of the Société entomologique de France.

Written works Le Corps vitellin de Balbiani dans l’oeuf des vertébrés (1893)-- The body of Balbiani yolk in the egg of vertebrates. Lec¸ons sur la cellule : morphologie et reproduction (1896)--- Lessons on the cell: Morphology and reproduction. Recherches sur le développement des poissons osseux (Félix Alcan, Paris, 1889)-- Research on the development of bony fishes. Notice sur les titres et travaux scientifiques (1899)-- Brochure titles and scientific works. Traité des méthodes techniques de l'anatomie microscopique : histologie, embryologie et zoologie, a translation of the work of Arthur Bolles Lee (1849–1927), (O. Doin, Paris, 1887, re-edited in 1896 and in 1902). Les insectes, morphologie - reproduction - embryogenie, (1904)-- Insects; morphology, reproduction- embryology.

References World Cat Identities (list of publications) Parts of this article are based on a translation of an equivalent article at the French Wikipedia.

External links Works by or about Louis-Félix Henneguy at the Internet Archive

Illustrations

Louis-Félix Henneguy: Portrait of Louis-Félix Henneguy
Portrait of Louis-Félix Henneguy

Worked examples

Example 1 — a first encounter with Louis-Félix Henneguy

Start with the simplest possible case. Write down what Louis-Félix Henneguy claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Louis-Félix Henneguy before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Louis-Félix Henneguy ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Louis-Félix Henneguy

In research
Louis-Félix Henneguy appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Louis-Félix Henneguy in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Louis-Félix Henneguy is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1850 births, 1928 deaths, Academic staff of the Collège de France, so understanding it makes those chapters shorter.
In everyday life
Look for Louis-Félix Henneguy outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Louis-Félix Henneguy in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Louis-Félix Henneguy means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Louis-Félix Henneguy out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Louis-Félix Henneguy in simple terms?

Louis-Félix Henneguy (18 March 1850 – 16 January 1928) was a French zoologist and embryologist born in Paris. In 1875, he received his medical doctorate from the University of Montpellier with a dissertation on the physiological action of poisons, Étude physiologique sur l'action des poisons.

Why does Louis-Félix Henneguy matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Louis-Félix Henneguy?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Louis-Félix Henneguy.

Tags

  • 1850 births
  • 1928 deaths
  • Academic staff of the Collège de France
  • French zoologists
  • Members of the French Academy of Sciences
  • Presidents of the Société entomologique de France
  • Scientists from Paris
  • University of Montpellier alumni

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