chemistry

James Ballantyne Hannay

James Ballantyne Hannay is a chemistry 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 James Ballantyne Hannay rather than just read about it. In short: James Ballantyne Hannay FRSE (1855–1931) was a Scottish chemist who believed he had synthesized diamond in 1880. However, modern testing showed that the surviving samples from his experiments were natural diamond, not synthetic.

Key takeaways

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

Reference excerpt

James Ballantyne Hannay FRSE (1855–1931) was a Scottish chemist who believed he had synthesized diamond in 1880. However, modern testing showed that the surviving samples from his experiments were natural diamond, not synthetic. While his techniques were conducive to diamond formation, modern diamond production – not achieved until the 1950s – requires capabilities not available in Hannay's time. Hannay was also known for making precision instruments.

Life James Ballantyne Hannay was born at 22 Monteith Row in Glasgow on New Year's Day, 1855. His father was Alexander Hannay, tool-maker, who owned property in Helensburgh and who was the proprietor of the Prince of Wales Theatre, later rebuilt as the Grand Theatre, in Cowcaddens, Glasgow. James Hannay became a chemist and was a prolific innovator. He published several scientific papers and took out over 70 patents in Britain, Europe and the USA. He also formed his own patents company in Glasgow. His most controversial scientific work, which was also his best known, related to his claim, made in 1880, that he had successfully synthesised diamonds. These claims have been investigated by a number of scientists including Sir Robert Robertson, (1869–1949) the first person to establish that two types of natural diamond existed, who took a great personal interest in them. In 1876 he was elected a Fellow of the Royal Society of Edinburgh. His proposers were Thomas Edward Thorpe, William Dittmar, William Thomson, Lord Kelvin and Alexander Crum Brown. In the later years of his life Hannay turned away from scientific investigation and moved his attention to examining aspects of the origin and development of religion and published a number of works critical of the Hebrew Scriptures. James Ballantyne Hannay died in 1931. A collection of archives relating to Hannay was collected by Sir Robert Robertson. These were given to the University of Dundee by Sir Robert's son, Robert H. S. Robertson, who himself carried out much research into the life and career of James Hannay. These records are now held by the university's Archive Services. The university also holds the archives of his father Alexander Hannay.

References

External links Heritage: The Case of the Hannay Diamonds. New Scientist, 21 February 1980, p. 591.

http://www.helensburghheroes.com/heroes/james_ballantyne_hannay http://clanhannay.com/ClanHannay/history/51602-1983/1J_B_Hannay.asp Archived 27 October 2010 at the Wayback Machine

Worked examples

Example 1 — a first encounter with James Ballantyne Hannay

Start with the simplest possible case. Write down what James Ballantyne Hannay claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, 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 James Ballantyne Hannay 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 James Ballantyne Hannay 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 James Ballantyne Hannay

In research: James Ballantyne Hannay appears in chemistry 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 James Ballantyne Hannay 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: James Ballantyne Hannay is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1855 births, 1931 deaths, 19th-century Scottish chemists, so understanding it makes those chapters shorter.
In everyday life: Look for James Ballantyne Hannay 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 James Ballantyne Hannay in 20 minutes

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

Frequently asked questions

What is James Ballantyne Hannay in simple terms?

Why does James Ballantyne Hannay matter?

Because it connects several chemistry 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 James Ballantyne Hannay?

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 James Ballantyne Hannay.