The Riddle of the Compass: The Invention That Changed the World (Hardcover)

~ (Author) "I FIRST BECAME INTERESTED IN THE COMPASS WHEN I was a child..." (more)
Key Phrases: sixteen directions, twelve winds, magnetic compass, Marco Polo, Flavio Gioia, Middle Ages (more...)

Editorial Reviews

From School Library Journal

Adult/High School-Prior to the invention of the compass, a merchant or sailor who wished to cross a large body of water was forced to navigate by studying the winds and stars or by never sailing out of the sight of land. Long ocean voyages were impossible and even sailing the Mediterranean could be a lengthy and hazardous voyage. The compass changed all of this. Mariners could now strike out on an azimuth and have a reasonable chance of arriving at their destination. This led to the Age of Exploration and the expansion of the European kingdoms into economic empires. Yet as important as the compass is, its origins are shrouded in mystery. The small town of Amalfi, Italy, claims to be the birthplace of the inventor of the compass, but China has an even stronger case. Aczel examines the myths, legends, and facts behind the dispute and provides a logical, although not indisputable, conclusion on which nation can claim the compass as its own. He also provides a layman's overview of the development of navigation from the earliest days to the 15th century. Although the author is primarily known for his scientific books, Riddle of the Compass contains little or no jargon and a minimum of scientific terminology. A worthwhile and interesting addition.

Robert Burnham, R. E. Lee High School, Springfield, VA

Copyright 2002 Cahners Business Information, Inc.

From Library Journal

Despite its brevity, this book covers its topic completely. In this detailed history, Aczel (God's Equation; Bentley Coll.) takes us back in time to Amalfi, Italy, where between 1295 and 1302 the compass as we know it was developed. Aczel points out, however, that the actual discovery of materials that followed magnetic lines, or at least consistently pointed in a specific direction (south), is attributed to the Chinese in 1040. The story of the compass is also the story of navigation, which the author admirably combines. Debunking the myth that sailors followed the coastlines of countries until they met their desired location, the author describes how they navigated the open seas using the sun, stars, wind, and even the migration of birds. While this book is not a page-turner, it is an accurate account of the important historical events that lead to the compass's development. Tellingly, Aczel grew up on a ship and was navigating straits in the Mediterranean long before he could drive a car. Recommended for public as well as academic libraries whose readers want to go beyond the account generally given in an encyclopedia.
- James Olson, Northeastern Illinois Univ., Chicago
Copyright 2001 Reed Business Information, Inc.

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Product Details

• Hardcover: 200 pages
• Publisher: Houghton Mifflin Harcourt; 1 edition (August 16, 2001)
• Language: English
• ISBN-10: 0151005060
• ISBN-13: 978-0151005062
• Product Dimensions: 8.1 x 5.7 x 0.8 inches
• Shipping Weight: 14.1 ounces
• Average Customer Review: 3.6 out of 5 stars  See all reviews (46 customer reviews)
• Amazon.com Sales Rank: #967,725 in Books (See Bestsellers in Books)

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Customer Reviews

Most Helpful Customer Reviews

10 of 10 people found the following review helpful:

5.0 out of 5 stars Accessible, entertaining, and edifying, January 18, 2002

By	Peter D. Mark (Seattle, Washington) - See all my reviews

Amir Aczel's _The Riddle of the Compass_ tells a sweeping tale spanning continents and centuries. While this tale includes some discussion of the natural history of the earth's geological composition, magnetic field, and recent research showing that certain nerve fibers in fish are sensitive to this magnetic field and may play a role in their migratory behavior, the book concentrates on the human history of navigation and how the development of the compass spurred commerce, trade, and the expansion of European naval powers.

He weaves into this tale a survey of maritime navigational techniques used in antiquity by the Greeks and Egyptians. He gives an impressively well-researched survey of the references to the compass in European writings, the earliest dating to 1187 by the English Augustinian Monk Alexander Neckam. Aczel touches on a number of unusual subjects that turn out to be connected to the compass in surprising ways: the Chinese art of feng shui, ancient Chinese divination practices, Aegean archeology, including a particular Etruscan chandelier, the travels of Marco Polo, the development of cartography and nautical charts in medieval Europe. Along the way he treats the reader to a crash course in Italian history ranging from the Roman empire, the Crusades, through the rise of the city-states Amalfi, Naples, and Venice, the navigational methods employed by the great Spanish and Portuguese explorers such as Magellan, da Gama, and Columbus, and some interesting trivia such as the real meaning and origin of the phrase "to sail the seven seas" and how a possibly misplaced comma bears on the identity of the man who at one time was thought to have invented the compass, and of whom the residents of Amalfi erected a statue as a tribute.

Like his earlier books, this one is accessible, entertaining, and edifying. The narrative has a natural flow and the stamp of Aczel's personal connection with the subject. (He spent much of his youth working on board a Mediterranean cruise ship that his father captained.) In places, footnotes would have been helpful. While there is a useful bibliography, certain passages in the text cry out for specific documentation. For example, he mentions that Jesuit priests in 17th century China ordered the prohibition, and even burning of books on the subject of feng shui. It would have been helpful to see specific documentation for such claims. Aside from this, _The Riddle of the Compass_ is an admirable book that uncovers a little-known history of the compass, a navigational tool so common today that we take it for granted, and discusses how, by radically improving maritime navigation, it changed the world by opening up new possibilities of commerce and conquest.

10 of 12 people found the following review helpful:

5.0 out of 5 stars History Guided by the Compass, September 17, 2001

By	R. Hardy "Rob Hardy" (Columbus, Mississippi USA) - See all my reviews (TOP 50 REVIEWER)    (REAL NAME)

If you think of objects in the category "inventions that changed the world," you might not think of the compass right off the bat, but a good case can be made for it having changed the world more than any invention since the wheel. Amir Aczel makes that case convincingly in _The Riddle of the Compass: The Invention that Changed the World_ (Harcourt), an entertaining look at an invention most of us don't use every day but which has gotten used on our behalf for centuries. He starts in Amalfi, home of Flavio Gioia, the inventor of the compass. Well, he wasn't really the inventor, as the Chinese were using it, sometime before 1040 CE, and Flavio lived around the fourteenth century. What he invented was the nautical compass box, with the familiar star on the disc with the elaborate arrow that always points north. Actually, he probably didn't even invent that. He probably didn't even exist. It is a funny story as to how he came to be regarded as the inventor of the compass, and even got his statue in the center of Amalfi, when he probably was a nonentity.

The Chinese had trade only by land and river, so there was little reason for the compass to be developed as a navigational tool. It was, essentially, a mysterious toy. They used the compass for feng shui. The practical use perfected in Amalfi was passed, when Amalfi lost its power base, to the glory and enrichment of Venice. With a compass, Venetian ships could sail during clouded winters, and could become huge transports. When other nations began using it for transoceanic trade, they put Venice into eclipse, and brought on our modern world.

Aczel covers the long era of pre-compass navigation, showing how sailors were dependent on clear skies and on the lead-weighted sounding line, which could tell the depth. They also used seasonal knowledge of winds and currents, and even looking for the traveling patterns of birds and sea snakes. He spurns the idea that they only piloted by "hugging the shore," which would never explain how they managed when they left sight of land, and which represents taking on the greatest of navigational risks, running aground. The compass, when we got around to using it, changed all that: "A great invention can lie dormant or be used for secondary purposes for a very long time and then suddenly be discovered by the right people - individuals with vision and an entrepreneurial spirit - and be exploited to its fullest extent. When this happens, such inventions can change the way we live." Aczel, a fine popular science writer who has most recently written on Fermat's Last Theorem and on the mathematical search for infinity, has here combined national histories, sea lore, and personal insight to make an absorbing history of an underrated tool.

4 of 4 people found the following review helpful:

5.0 out of 5 stars The Compass In History, March 5, 2002

By	Kevin Spoering (Buffalo, Missouri United States) - See all my reviews (REAL NAME)

Amir Aczel presents us with the story of the origins of the compass, in as much detail as scholars have been able to discover. Aczel covers the use of the compass with ancient mariners and how these mariners had to rely on other navigational aids in the days before the compass, such as wind, plants, sounding lines, sea life, geography, currents, etc.. Also mentioned as well is the use of stars in determining latitude, longitude was much more difficult to determine due to the lack of accurate chronometers in early times.

Much of this volume deals with the origin of the 16 point wind rose and how it became incorporated into the modern compass, documented with events and ancient documents in China, and Italy, up to medival times and beyond. This includes discussions of the Etruscans, the cities of Amalfi and Venice, the explorer Marco Polo, all relating to the development of the compass. The second to last chapter sketches the voyages in the Great Age Of Exploration which were vastly aided by the compass, in addition to the astrolabe, a precursor of the sextant.

I believe that Amir Aczel made a very good case here that the compass is one of the pivitol inventions of humanity. Ask yourself this: if the compass had never been invented (which would have slowed down trade and the exchange of information and ideas) how many years of progress would have been lost? My wild guess is 50-100 years of lost progress, a lot.