Great Rivalries in Science and Invention
Explore famous scientific rivalries, the ideas at stake, and the difference between documented history and popular myth.
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Questions with solutions-
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What practical challenge was central to the “war of currents”?
As electric lighting spread, Edison's direct-current networks and Tesla's alternating-current inventions offered competing approaches to supplying growing cities.
- Storing electricity in rechargeable batteries
- Distributing electricity to homes and businesses
- Sending coded messages through telegraph wires
Think about what a city needs before its electric lights can work.
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- Distributing electricity to homes and businesses
The rivalry concerned entire power systems, not simply who could invent a better light bulb.
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What results from adding up speed multiplied by each very short time interval?
The calculus developed by Newton and Leibniz can combine continuously changing quantities. For a car whose speed varies, each brief interval contributes a small amount to the journey's total.
- The total distance traveled
- The total amount of fuel burned
- The total force produced by the engine
Speed tells you how much distance is covered per unit of time.
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- The total distance traveled
This process is integration: combining small contributions to find an accumulated total.
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Why was voltage transformation useful for long-distance power distribution?
For the same amount of electrical power, a higher transmission voltage allows a lower current. Lower current reduces heating losses in wires. Transformers made changing AC voltage practical.
- Power could travel at low voltage without the heating losses associated with higher current.
- Every appliance could receive the same high voltage used on transmission lines.
- Power could travel at high voltage and be reduced to a suitable voltage near customers.
The best voltage for transmission is not necessarily suitable for household use.
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- Power could travel at high voltage and be reduced to a suitable voltage near customers.
The ability to change voltage gave AC systems an important practical advantage during the rivalry.
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What did this licensing arrangement allow Westinghouse's company to do?
Westinghouse licensed Tesla's patents, obtaining permission to use the inventions in commercial AC systems. Turning those inventions into working networks also required investment and engineering teams.
- Claim that its own engineers had originally invented Tesla's patented designs
- Use the patented technology under an agreement
- Make the patented technology available to everyone without permission
Permission to use an invention is different from claiming to have invented it.
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- Use the patented technology under an agreement
Licensing can connect an inventor's work with the resources needed to bring it into everyday use.
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Which museum practice would best address this particular problem?
The fossil rivalry between Cope and Marsh produced many discoveries. However, rushed descriptions sometimes assigned different names to specimens belonging to the same species.
- Compare newly named specimens carefully with existing collections.
- Assume that fossils from different dig sites must represent different species.
- Decide whether a species is distinct based on the discoverer's reputation.
A new discovery location does not necessarily mean a new species.
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- Compare newly named specimens carefully with existing collections.
Scientific names are hypotheses about classification; careful comparison can reveal that two names refer to the same species.
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What chemical difficulty did Pauling's central arrangement create?
During the race to explain DNA's structure, Linus Pauling proposed a three-stranded model with phosphate groups packed near its center. Under normal biological conditions, these groups carry negative charges, and like charges repel. Watson and Crick's rival model placed them on the outside.
- Repulsion would draw the phosphate groups toward a shared center.
- Negative charge would prevent the phosphate groups from interacting with water.
- Repulsion would make the tightly packed core difficult to maintain.
Consider what happens when mutually repelling groups are crowded together.
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- Repulsion would make the tightly packed core difficult to maintain.
A proposed molecular structure must fit known chemistry, not merely form an attractive geometric model.
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Which description fits this episode?
Wallace sent Darwin an essay explaining natural selection, a mechanism Darwin had also developed independently. Their work was presented together at a scientific meeting, complicating the familiar story of a simple race between rivals.
- Darwin and Wallace had developed the theory through a shared research project.
- Independent ideas were brought together in a joint scientific announcement.
- Wallace withdrew his contribution so Darwin could announce the idea alone.
Distinguish how the ideas originated from how they were announced.
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- Independent ideas were brought together in a joint scientific announcement.
Competition for recognition can coexist with cooperation; Wallace later defended Darwin's contribution.
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Which account best preserves both the chronology and the historical consensus?
Newton developed his calculus methods before Leibniz, but Leibniz published his account first. Historians generally regard their development of calculus as independent.
- Both developed calculus independently, although development and publication occurred in different orders.
- Leibniz's earlier publication establishes that Newton learned calculus from him.
- Newton's earlier development establishes that Leibniz could not have reached similar ideas independently.
Being first to develop an idea and first to publish it are different achievements.
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- Both developed calculus independently, although development and publication occurred in different orders.
Priority disputes often become misleading when invention, publication, and influence are treated as the same thing.
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What does Bell's patent establish without requiring an additional historical claim?
Bell's lawyers filed a telephone patent application on the same day that Gray's lawyers filed a formal notice protecting a proposed telephone design. Bell later received a patent. A patent grants legal rights, but it does not automatically identify every contributor to an invention.
- Gray's proposed design could not have contained any workable ideas.
- Bell independently originated every technical feature used in early telephones.
- Bell received legal protection for the invention covered by that patent.
Separate a legal decision from a complete history of technological development.
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- Bell received legal protection for the invention covered by that patent.
Patent rights and historical originality are related questions, but one does not fully settle the other.
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How should this report be used in a historical account?
During the calculus priority dispute, a Royal Society inquiry favored Newton. Newton was the society's president and was heavily involved in preparing the report that supported his own position.
- As conclusive proof of sole invention, since an official report cannot favor a participant
- As evidence of the dispute, while accounting for Newton's influence on its conclusions
- As proof that Leibniz invented calculus first, since a biased report must reach a false conclusion
A lack of independence is not the same as proof that every conclusion is wrong.
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- As evidence of the dispute, while accounting for Newton's influence on its conclusions
A conflict of interest limits a report's independence; it does not, by itself, establish that its conclusions are false.