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astronomy

Janet Taylor

Janet Taylor 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 Janet Taylor rather than just read about it. In short: Janet Taylor (born Jane Ann Ionn; 13 May 1804 – 25 January 1870) was an English astronomer, navigation expert, mathematician, meteorologist, and founder of the George Taylor Nautical Academy. She was the author of various astronomy and navigation works, and owner of a navigational instrument production and repair warehouse.

Janet Taylor — main illustration
Janet Taylor — illustration

Key takeaways

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

Reference excerpt

Janet Taylor (born Jane Ann Ionn; 13 May 1804 – 25 January 1870) was an English astronomer, navigation expert, mathematician, meteorologist, and founder of the George Taylor Nautical Academy. She was the author of various astronomy and navigation works, and owner of a navigational instrument production and repair warehouse. Her "George Taylor Nautical Academy" was highly regarded by the East India Company, Trinity House, and the Admiralty. She received medals from both the King of Prussia and King of the Netherlands, and her rule for calculating latitude from altitude was described as "ingenious". Taylor was among the few women working as a scientific instrument designer in 19th century London. Her 1834 patented "Mariner's Calculator" was dismissed by the Admiralty, and was later reassessed as "genius but impractical in the 'clumsy' hands of its potential users."

Early life Taylor was born Jane Ann Ionn in Wolsingham, England, on 13 May 1804. Her parents were Reverend Peter Ionn and Jane Deighton, and she was their sixth child of eight. Her father was the headmaster of a Wolsingham School, which she attended, and which was one of the few Northern English schools to teach navigation. At nine years old, she received a scholarship to attend Phoebe Wright's Royal School for female embroiderers in Ampthill, Bedfordshire, which had an entry age of fourteen. Queen Charlotte was the school's patron and she waived the age requirement in her case. When her father died, Taylor invested her inheritance into a career in the male-dominated field of nautical education. In 1821, she began managing the finances of her older brother's business. On 30 January 1830, she married George Taylor Jane in the Netherlands and became a stepmother of three children. The marriage took place at the British ambassador's house in The Hague and they both changed their last name to Taylor. They were to have eight more children together and six survived their early lives.

Achievements Taylor opened the George Taylor Nautical Academy in 1833 with her husband. During this time she published "Luni-Solar and Horary Tables: with their application in nautical astronomy; containing an easy and correct method of finding the longitude, by lunar observations and chronometers; the latitude, by double altitudes and elapsed time, the azimuth, amplitude, and true time," which discussed calculations that could "reduce the lunar distance" using a formula she derived herself. In 1834, she received a patent for her "Mariner's Calculator". The invention was not adopted by the British Royal Navy as it was deemed "unworthy for the Lordships Patronage" by the Admiralty. Later, she published a second edition of "Principles of Navigation Simplified", however she faced financial difficulties following its release and her invention's failure. Around mid-1835, she had a child. After improving her lunar distance formula, she published the second edition of Luni-Solar and Horary Tables. She owed much of this success to Francis Beaufort, who helped push for the acceptance of her work by the Naval establishment.

Luni-Solar and Horary Tables This was Taylor's first published book, in 1833. It was specifically meant to simplify the calculations of astronomical navigation by using the moon instead of the sun as one's point of reference. There was a lot of discussion around finding the best way to calculate longitude while at sea. Luni-Solar and Horary Tables became a great success, due to Taylor's discovery proving that the earth is spheroidal rather than spherical. She uses "he" instead of "her" to refer to herself throughout the book, because of how male-dominated her field was. Taylor dedicated this book to King William IV, who offered her a job as an educator for nobility. In 1833 the first edition of Luni-Solar and Horary Tables was reviewed in The United Service Journal, The Atlas, and The Morning Advertiser. These positive reviews urged young mariners to use this as their basis of studying. In 1834, Taylor published a shorter version of Luni-Solar and Horary Tables called The Principles of Navigation Simplified: with Luni-Solar and horary tables, and their application in Nautical Astronomy. In 1835, after getting a grant from the Admiralty, Trinity House, and East India Company, Taylor published the second edition of Luni-solar and Horary Tables; by 1854 this book was in its seventh and last edition. Taylor published a second book, An Epitome of Navigation, and Nautical Astronomy, with the Improved Lunar Tables, in 1842. This ran to twelve editions by 1859.

Mrs. Janet Taylor's Nautical Academy and Navigation Warehouse After the second edition of her book, Luni-Solar and Horary Tables, came out in 1835, and with steady income from her first nautical academy, Taylor was able to open a second academy in late 1835. By this time, Taylor was recognised as a credible mathematician and entrepreneur. Mrs. Janet Taylor's Nautical Academy and Navigation Warehouse offered training in all subjects a mariner would need: "a complete course on Navigation, including Trigonometry, and its application to Navigation. Another course was Algebra, Geometry, Physical Geography in relation to the velocity of tides, waves, etc. Mechanics including the Composition of Forces, Mechanical powers, the Laws of Motion, the strength of strain, of materials; wind, rain, steam powers, Atmospheric and Oceanic Phenomena... and so it continued....".

During the late 1830s and 40s, her academies were advertised in the Shipping and Mercantile Gazette and the London Shipping Gazette. Taylor's second academy had a positive impact on the young English mariners, and the expansion of her second nautical academy was endorsed by organisations including the Admiralty, the Trinity House, and the East India Company. This expansion allowed her to house pupils who would not otherwise have been able to attend.

… excerpt ends here. Continue reading the full article.

Illustrations

Janet Taylor illustration
Janet Taylor: An Epitome of Navigation and Nautical Astronomy with the Improved Lunar Tables, by Jane Taylor in print from 1842 to 1859
An Epitome of Navigation and Nautical Astronomy with the Improved Lunar Tables, by Jane Taylor in print from 1842 to 1859
Janet Taylor: Janet Taylor's 1850 trade card
Janet Taylor's 1850 trade card

Worked examples

Example 1 — a first encounter with Janet Taylor

Start with the simplest possible case. Write down what Janet Taylor 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 Janet Taylor 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 Janet Taylor 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 Janet Taylor

In research
Janet Taylor 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 Janet Taylor 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
Janet Taylor is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1804 births, 1870 deaths, 19th-century British artisans, so understanding it makes those chapters shorter.
In everyday life
Look for Janet Taylor 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 Janet Taylor in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Janet Taylor 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 Janet Taylor out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Janet Taylor in simple terms?

Janet Taylor (born Jane Ann Ionn; 13 May 1804 – 25 January 1870) was an English astronomer, navigation expert, mathematician, meteorologist, and founder of the George Taylor Nautical Academy. She was the author of various astronomy and navigation works, and owner of a navigational instrument produc…

Why does Janet Taylor 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 Janet Taylor?

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 Janet Taylor.

Tags

  • 1804 births
  • 1870 deaths
  • 19th-century British artisans
  • 19th-century English astronomers
  • 19th-century English women scientists
  • 19th-century English women writers
  • People from Wolsingham
  • Women astronomers
  • Women instrument makers

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