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Humphry Marshall

Humphry Marshall 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 Humphry Marshall rather than just read about it. In short: Humphry Marshall (October 10, 1722 – November 5, 1801) was an American botanist and plant dealer. Biography Humphry Marshall was born at Derbydown Homestead in the village of Marshallton, Pennsylvania (within West Bradford Township) on October 10, 1722.

Humphry Marshall — main illustration
Humphry Marshall — illustration

Key takeaways

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

Reference excerpt

Humphry Marshall (October 10, 1722 – November 5, 1801) was an American botanist and plant dealer.

Biography

Humphry Marshall was born at Derbydown Homestead in the village of Marshallton, Pennsylvania (within West Bradford Township) on October 10, 1722. He was the cousin of botanists John Bartram and William Bartram. Like many early American botanists, he was a Quaker. Marshall received the rudiments of an English education, and was apprenticed to the business of a stonemason, which trade he subsequently followed. Soon after his marriage in 1748 to Sarah Pennock he took charge of his father's farm. His first book, A Few Observations Concerning Christ, in 1755. He began to devote his attention to astronomy and natural history, building a small observatory in one corner of his residence. He specialized early in native plants, after gaining his enthusiasm for botany from John Bartram. In 1767 he came into the possession of the family estate, and in 1773 he created a botanical garden at Marshallton with both native and exotic plants. This was the second botanical garden in the United States, the first having been established by John Bartram. As late as 1849, many of the plants still survived, although neglect had turned the garden into a wilderness. In 1785, Marshall published Arbustrum Americanum: The American Grove, an Alphabetical Catalogue of Forest Trees and Shrubs, Natives of the American United States (Philadelphia). For many years, he was the treasurer for Chester County and trustee of the public loan office. In 1768, he was elected a member of the American Philosophical Society, and he was a member of other scientific societies. Marshall's first wife died in 1786; he married Margaret Minshall in 1788. He had no children by either wife. In his later years, he was partly blinded by cataracts. Marshall died on November 5, 1801. It appears Humphrey Marshall was a slaveholder. This research paper Slavery-in-the-Greater-Philadelphia-copyedited-Jan-2024.pdf case #16 mentions Negro Abraham Johnson, slave of Humphrey Marshall.

Legacy Marshall has been called the "Father of American Dendrology." A genus of plants, Marshallia, was named in honor of Humphry Marshall and his nephew Moses Marshall, also a botanist. In 1848 the Borough of West Chester established the Marshall Square Park in his honor. Marshall Square Park is four miles east of Marshallton. On June 27, 2007 — proclaimed Humphry Marshall Day by West Chester mayor Dick Yoder — a marker honoring the park's namesake was unveiled.

Notes

https://lowermerionhistory.org/wp-content/uploads/2024/02/Slavery-in-the-Greater-Philadelphia-copyedited-Jan-2024.pdf

References American Philosophical Society: Humphry Marshall Friends of Marshall Square Park Historical Marker database HMdb - Humphry Marshall Archived 2022-01-30 at the Wayback Machine Humphry and Moses Marshall Papers at the William L. Clements Library

Worked examples

Example 1 — a first encounter with Humphry Marshall

Start with the simplest possible case. Write down what Humphry Marshall 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 Humphry Marshall 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 Humphry Marshall 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 Humphry Marshall

In research
Humphry Marshall 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 Humphry Marshall 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
Humphry Marshall is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1722 births, 1801 deaths, 18th-century American botanists, so understanding it makes those chapters shorter.
In everyday life
Look for Humphry Marshall 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 Humphry Marshall in 20 minutes

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

Frequently asked questions

What is Humphry Marshall in simple terms?

Humphry Marshall (October 10, 1722 – November 5, 1801) was an American botanist and plant dealer. Biography Humphry Marshall was born at Derbydown Homestead in the village of Marshallton, Pennsylvania (within West Bradford Township) on October 10, 1722.

Why does Humphry Marshall 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 Humphry Marshall?

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 Humphry Marshall.

Tags

  • 1722 births
  • 1801 deaths
  • 18th-century American botanists
  • American Quakers
  • American botanists
  • Botanists active in North America
  • Dendrologists
  • Members of the American Philosophical Society
  • Merchants from colonial Pennsylvania
  • People from Chester County, Pennsylvania

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