science

Richard Henry Jelf

Richard Henry Jelf is a science 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 Richard Henry Jelf rather than just read about it. In short: Colonel Richard Henry Jelf (2 February 1844 – 26 April 1913) was a British army officer and commandant of the Royal Military Academy, Woolwich. Early life Jelf was born in Oxford, the third and youngest son of the Reverend Doctor Richard William Jelf (1798-1871), Principal of King's College, London, and canon of Christ Church, Oxford.

Key takeaways

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

Reference excerpt

Colonel Richard Henry Jelf (2 February 1844 – 26 April 1913) was a British army officer and commandant of the Royal Military Academy, Woolwich.

Early life Jelf was born in Oxford, the third and youngest son of the Reverend Doctor Richard William Jelf (1798-1871), Principal of King's College, London, and canon of Christ Church, Oxford. His older brothers were George Edward Jelf, later canon of Rochester, and lawyer Sir Arthur Richard Jelf. He was educated at Eton College and King's College, London, before entering the Royal Military Academy in Woolwich.

Military career Jelf entered the Royal Engineers in 1865. He was promoted to captain in 1878, to Major and Lieutenant-Colonel in 1885, and Colonel in 1889. He saw service on the Bechuanaland Expedition (1884-1885), as Director of Military Telegraphs (and was honourably mentioned, Brevet Lieutenant-Colonel). He was later chairman of Sanitary Commissioners, Gibraltar (1893-1897; for which he was invested as a Companion of St Michael and St George). He commanded the Royal Engineers, Eastern District, from 1897 to 1901. He retired in 1901 but was recalled to employment as temporary Major-General in the same year, becoming Governor and Commandant of the Royal Military Academy, Woolwich, a post he retained until 1912. While Commandant, he commissioned the academy's chapel in 1902, an act for which he is commemorated by a brass plaque in the chapel. He was also a spokesman for the Church of England Soldiers' Institutes Association, and wrote a 1910 biography of his friend Joseph James Curling, a soldier and priest who had also joined the Royal Engineers in 1865. In 1882, Jelf commissioned a bell for St Mary's church in Newfoundland's Bay of Islands, where Curling was priest.

Family Jelf lived at Ashbourne, Derbyshire, where, in May 1911, he was appointed a Deputy Lieutenant. With his wife Margaret (nee Blunt, 1839–1921), whom he married on 10 August 1869, he had at least three sons. Wilfrid Jelf and Henry Jelf were both first-class cricketers and military officers. A third son, Richard John Jelf, joined the Royal Engineers and after being invalided home from South Africa shot himself and was buried at sea in June 1900 - a plaque commemorating him and his parents is displayed in Ashbourne's St Oswald's Church.

References

Worked examples

Example 1 — a first encounter with Richard Henry Jelf

Start with the simplest possible case. Write down what Richard Henry Jelf claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Richard Henry Jelf 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 Richard Henry Jelf 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 Richard Henry Jelf

In research: Richard Henry Jelf appears in science 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 Richard Henry Jelf 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: Richard Henry Jelf is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1844 births, 1913 deaths, 19th-century British Army personnel, so understanding it makes those chapters shorter.
In everyday life: Look for Richard Henry Jelf 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 Richard Henry Jelf in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Richard Henry Jelf means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Richard Henry Jelf out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Richard Henry Jelf in simple terms?

Colonel Richard Henry Jelf (2 February 1844 – 26 April 1913) was a British army officer and commandant of the Royal Military Academy, Woolwich. Early life Jelf was born in Oxford, the third and youngest son of the Reverend Doctor Richard William Jelf (1798-1871), Principal of King's College, London…

Why does Richard Henry Jelf matter?

Because it connects several science 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 Richard Henry Jelf?

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 Richard Henry Jelf.