chemistry

Jack Rose (colonel)

Jack Rose (colonel) 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 Jack Rose (colonel) rather than just read about it. In short: John George Rose (11 January 1876–20 February 1973) was a South African analytical chemist, an army officer in various wars and a Grand Master of the Freemasons of South Africa. He also held world records for human-paced cycling.

Key takeaways

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

Reference excerpt

John George Rose (11 January 1876–20 February 1973) was a South African analytical chemist, an army officer in various wars and a Grand Master of the Freemasons of South Africa. He also held world records for human-paced cycling.

Early life Rose was born on 11 January 1876 in Cape Town, South Africa. He was the son of John Edwin Benjamin Rose (auditor-general of the Cape Colony) and Emmerentia Johanna Steytler. He attended the South African College School in Cape Town and passed matric at the University of the Cape of Good Hope in 1893.

Career as a chemist At the end of 1896, he started to work as assistant analyst in the Government Analytical Laboratory, Cape Town. In 1912 the Government appoint him as a first-grade chemical assistant in the Government Analytical Laboratory. The South African Railways and Harbours Administration appointed him as chief chemist in 1929. He stayed in that position until his retirement in 1935. He was an analytical chemist by profession. Rose was a member of various science and chemical organizations or associations, including the South African Association for the Advancement of Science (1903), the British Association for the Advancement of Science (1905), the Royal Society of South Africa (1910), the South African Association of Analytical Chemists (1921) and the Institute of Chemistry of Great Britain and Ireland (1933). He was President of Cape Chemical Society in 1923, and President of the South African Association for the Advancement of Science in 1943.

Publications Rose, J.G. (1910) "A new Cape thermal Chalybeate spring". South African Journal of Science, 7, 202-203. Rose, J.G. (1911) "The Insizwa copper nickel deposits". South African Journal of Science, 129-130. Rose, J.G. (1929) "Alcohol mixtures as motor fuel in South Africa". South African Journal of Science, 26, 29-38.

Sport Rose was a keen sportsman. He twice held the world amateur human-paced hour record for cycling in 1898 and 1899, riding 30 miles 606 yards in the hour at the Green Point cycle track. He was captain of the Alfred Rowing Club, winning five championships for six oars in Table Bay.

Military Rose had a long military career. He served in the South African College Cadet Corps for five years, later becoming the corps commander. In the Anglo-Boer War between 1899 and 1902, he was a captain in the Cape Colonial Cycle Corps, and received the Queen's South Africa Medal. Rose then served as lieutenant in the Duke of Edinburgh's Own Volunteer Rifles. During World War I, he was assigned to the mechanical transport in the German South West Africa project, receiving the Star medal and Croix de Guerre. He obtained the rank of lieutenant-colonel and later became the chief inspector of mechanical transport in East Africa. He also received the Distinguished Service Order (DSO) medal. In World War II Rose was director of transportation of the Union Defence Force.

Freemasons Succeeding Conrad Silberbauer, Rose was Grand Master of the Freemasons in South Africa from 1944 to 1957. Colonel C.G. Botha took over from him in 1957.

Death Rose died, aged 97, on 20 February 1973 in Cape Town in a house called Beau Soleil (today the Beau Soleil Music Centre).

References

Worked examples

Example 1 — a first encounter with Jack Rose (colonel)

Start with the simplest possible case. Write down what Jack Rose (colonel) 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 Jack Rose (colonel) 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 Jack Rose (colonel) 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 Jack Rose (colonel)

In research: Jack Rose (colonel) 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 Jack Rose (colonel) 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: Jack Rose (colonel) is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1876 births, 1973 deaths, Alumni of South African College Schools, so understanding it makes those chapters shorter.
In everyday life: Look for Jack Rose (colonel) 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 Jack Rose (colonel) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Jack Rose (colonel) 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 Jack Rose (colonel) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Jack Rose (colonel) in simple terms?

Why does Jack Rose (colonel) 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 Jack Rose (colonel)?

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 Jack Rose (colonel).