astronomy

John Duer Irving

John Duer Irving 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 John Duer Irving rather than just read about it. In short: John Duer Irving (August 18, 1874 – July 20, 1918) was an American geologist. He was born in Madison, Wisconsin.

Key takeaways

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

Reference excerpt

John Duer Irving (August 18, 1874 – July 20, 1918) was an American geologist. He was born in Madison, Wisconsin. He graduated from Columbia University in 1896 and 1899. He was a member of the 11th Engineers, U.S. Army during World War I and died in France on July 20 or 26, 1918, of pneumonia. In 1899, he joined the United States Geological Survey and was assigned to a party in the Black Hills. He worked closely with Samuel Franklin Emmons on several important publications. He left direct employment with the USGS for one year in 1903 to teach at the University of Wyoming at Laramie. In 1907, he took the chair of economic geology at the Sheffield Scientific School at Yale University. At the time of this death, he was on leave from his position at Yale University. He was considered one of the foremost representatives of applied geology in the United States. He was also the managing editor of the journal Economic Geology from 1905 until his death. His father, Roland Duer Irving, was also a noted geologist.

Publications "The Downtown district of Leadville, Colorado." with S.F. Emmons. US Geological Survey Bulletin No. 320 (1907) "Geology and ore deposits near Lake City, Colorado" with Howland Bancroft. US Geological Survey Bulletin No. 478 (1911) "Replacement Ore Bodies and the Criteria for their Recognition" Canadian Mining Institute (1911) "Economic resources of the northern Black Hills" with Samuel Franklin Emmons. US Geological Survey Professional Paper No. 26 (1904)

References

Illustrations

Worked examples

Example 1 — a first encounter with John Duer Irving

Start with the simplest possible case. Write down what John Duer Irving 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 John Duer Irving 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 John Duer Irving 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 John Duer Irving

In research: John Duer Irving 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 John Duer Irving 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: John Duer Irving is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1874 births, 1918 deaths, American geologists, so understanding it makes those chapters shorter.
In everyday life: Look for John Duer Irving 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 John Duer Irving in 20 minutes

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

Frequently asked questions

What is John Duer Irving in simple terms?

John Duer Irving (August 18, 1874 – July 20, 1918) was an American geologist. He was born in Madison, Wisconsin.

Why does John Duer Irving 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 John Duer Irving?

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 John Duer Irving.