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The Twenty-One Balloons

The Twenty-One Balloons is a earth 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 The Twenty-One Balloons rather than just read about it. In short: The Twenty-One Balloons is a novel by William Pène du Bois, published in 1947 by the Viking Press and awarded the Newbery Medal for excellence in American children's literature in 1948. The story is about a retired schoolteacher whose ill-fated balloon trip leads him to discover Krakatoa, an island full of great wealth and fantastic inventions.

The Twenty-One Balloons — main illustration
The Twenty-One Balloons — illustration

Key takeaways

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

Reference excerpt

The Twenty-One Balloons is a novel by William Pène du Bois, published in 1947 by the Viking Press and awarded the Newbery Medal for excellence in American children's literature in 1948. The story is about a retired schoolteacher whose ill-fated balloon trip leads him to discover Krakatoa, an island full of great wealth and fantastic inventions. The events and ideas are based both on scientific fact and imagination, and the descriptions are accompanied by illustrations by du Bois. The novel depicts the 1883 eruption of Krakatoa.

Plot summary The introduction compares two types of journeys: one that aims to reach a place within the shortest time, and another that begins without regard to speed and without a destination in mind. Balloon travel is said to be ideal for the second kind. The main story begins with the rescue of Professor William Waterman Sherman, who is picked up by a steamship while floating among a strange wreck of twenty deflated gas balloons in the North Atlantic. Sherman, a recently retired schoolteacher, was last seen three weeks earlier leaving San Francisco on a giant balloon, determined to spend a year drifting alone, relaxing on the balloon basket house. The world waits breathlessly to find out how Sherman could have circumnavigated the globe in record time and landed in the ocean with twenty balloons rather than the one with which he began his journey. After several days' rest and a hero's welcome, the professor recounts his journey before a captivated audience. Sherman's uneventful flight over the Pacific Ocean was serene until an unfortunate accident involving a seagull puncturing his balloon forced him to crash land on a small volcanic island. He is befriended by Mr. F who informs him that he has landed on the island of Krakatoa and it is populated by twenty families sharing the wealth of a secret diamond mine - by far the richest in the world - which they operate as a cartel. Each year, the families sail to the outside world with a small amount of diamonds, to purchase supplies for the hidden and sophisticated civilization they have built on the island (they explain that introducing too many diamonds into the market at once would drive down their value to "a shipload of broken glass"). Each family has been assigned one of the first twenty letters of the alphabet, and lives in its own whimsical and elaborate house that also serves as a restaurant. The Krakatoa society follows a calendar with twenty-day months. On "A" Day of each month, everyone eats in Mr. and Mrs. A's American restaurant; on "B" Day, in Mr. and Mrs. B's British chop house; on "C" Day, in Mr. and Mrs. C's Chinese restaurant; on "D" Day, in Mr. and Mrs. D's Dutch restaurant, and so forth. Sherman's first friend on the island, Mr. F, runs a French restaurant containing a replica of the Hall of Mirrors. The houses are full of incredible items, such as Mr. M's Moroccan house, which has a living room with mobile furniture that operate like bumper cars. The children of the island invented their own form of amusement that combines elements from merry-go-rounds and balloon travel. When the volcano on Krakatoa erupts, the families and Sherman escape on a platform held aloft by twenty balloons. As the platform drifts westward around the world, the families parachute off to India and Belgium to start their new lives. Sherman remains on the platform and finally descends onto the waters of the Atlantic Ocean, where he is rescued. The professor concludes his speech by telling the audience he intends to build an improved balloon for a year of life in the air, financed by the diamond cufflinks he obtained in Krakatoa.

Comparison to The Diamond as Big as the Ritz The story is preceded by a note from du Bois, informing that just before publication his publisher noted a "strong resemblance" between the book and The Diamond as Big as the Ritz, a novella written by F. Scott Fitzgerald in 1922. Du Bois acknowledges it is "not only quite similar in general plot, but was also altogether a collection of very similar ideas." He says it was the first time he had heard of Fitzgerald's story, and "the fact that F. Scott Fitzgerald and I apparently would spend our billion in like ways right down to being dumped from bed into a bathtub is, quite frankly, beyond my explanation." The two stories share the common concept of a giant diamond mine and the resulting need to protect the secret of its existence. However, they differ significantly in tone and plot details. Fitzgerald's story does not involve balloons, nor a Utopian society on Krakatoa, nor fantastic mechanical inventions like those described in du Bois's story. Fitzgerald's story also takes a darker tone, with the mad owner of the mine having constructed a hollow in the earth to imprison the unfortunates who had discovered the mine. The story's protagonist has a sexual encounter with the daughter of the mine owner, and discovers that he faces execution. The stories also differ in their intentions and audiences. The Twenty-One Balloons is a children's story, with only a mild, playful interest in social commentary. By contrast, "The Diamond as Big as the Ritz" is a parable for adults; it articulates large social themes that preoccupied Fitzgerald throughout his career as a mature writer, and which found their way into his major novels, notably The Great Gatsby.

In popular culture In the TV show Mad Men, season four, episode five ("The Chrysanthemum and the Sword"), The Twenty-One Balloons is being read by a child, Sally Draper.

References

External links The Twenty-One Balloons title listing at the Internet Speculative Fiction Database The motion picture and digital rights to The Twenty-One Balloons are owned by Big View Pictures Inc. The flash story board for the film project can be viewed online http://bigviewpictures.com

Worked examples

Example 1 — a first encounter with The Twenty-One Balloons

Start with the simplest possible case. Write down what The Twenty-One Balloons claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth 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 The Twenty-One Balloons 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 The Twenty-One Balloons 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 The Twenty-One Balloons

In research
The Twenty-One Balloons appears in earth 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 The Twenty-One Balloons 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
The Twenty-One Balloons is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1883 eruption of Krakatoa, 1947 American novels, 1947 English-language novels, so understanding it makes those chapters shorter.
In everyday life
Look for The Twenty-One Balloons 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 The Twenty-One Balloons in 20 minutes

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

Frequently asked questions

What is The Twenty-One Balloons in simple terms?

The Twenty-One Balloons is a novel by William Pène du Bois, published in 1947 by the Viking Press and awarded the Newbery Medal for excellence in American children's literature in 1948. The story is about a retired schoolteacher whose ill-fated balloon trip leads him to discover Krakatoa, an island…

Why does The Twenty-One Balloons matter?

Because it connects several earth 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 The Twenty-One Balloons?

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 The Twenty-One Balloons.

Tags

  • 1883 eruption of Krakatoa
  • 1947 American novels
  • 1947 English-language novels
  • 1947 children's books
  • American children's novels
  • Children's books about volcanoes
  • Children's books set in Indonesia
  • Children's books set in San Francisco
  • Children's books set in the 1880s
  • Children's fantasy novels
  • Newbery Medal–winning works
  • Novels set in 1883

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