Also in 2024 Test B English, question 38; 2026 Practice Test C English, question 5.
Passage Invention of the Telegraph
Samuel Morse, an American inventor, is credited with creating the electronic telegraph, a communication device that allows users to send messages using a system of short and long pulses that represent letters, numbers, and punctuation. In 1843 the United States Congress passed the Telegraph Bill, which provided Morse with the funds to build an electric telegraph system.
Invention of the Telegraph
Earlier Signal Systems
Long before Samuel F. B. Morse electrically transmitted his famous message “What hath God wrought?” from Washington to Baltimore on May 24, 1844, there were signaling systems that enabled people to communicate over distances. Most were visual or “semaphore” systems using flags or lights. In the eighteenth century, such systems used an observer who would decipher a signal from a high tower on a distant hill and then send it on to the next station. The young American republic wanted just such a system along its entire Atlantic coast and offered a prize of $30,000 for a workable proposal. The framers of this legislation had no way of knowing that when they used the word “telegraph” to refer to this visual semaphore system, they would be offered an entirely new and revolutionary means of communication—electricity.
The Growth of an Idea
The idea of using electricity to communicate over distance is said to have occurred to Morse during a conversation aboard ship when he was returning from Europe in 1832. Michael Faraday’s recently invented electromagnet was much discussed by the ship’s passengers, and when Morse came to understand how it worked, he speculated that it might be possible to send a coded message over a wire. While a student at Yale College years before, he had written his parents a letter about how interesting he found the lectures on electricity. Despite what he had learned at Yale, Morse found when he began to develop his idea that he had little real understanding of the nature of electricity, and after sporadic attempts to work with batteries, magnets, and wires, he finally turned for help to a colleague at the University of the City of New York, Leonard D. Gale.
Gale was a professor of chemistry and familiar with the electrical work of Princeton’s Joseph Henry, a true pioneer in the new field. Well before Morse had his shipboard idea about a telegraph, Henry rang a bell at a distance by opening and closing an electric circuit. In 1831, he had published an article, of which Morse was unaware, that contained details suggesting the idea of an electric telegraph. Gale’s help and his knowledge of this article proved crucial to Morse’s telegraph system because Gale not only pointed out flaws in the system but showed Morse how he could regularly boost the strength of a signal and overcome the distance problems he had encountered by using a relay system Henry had invented. Henry’s experiments, Gale’s assistance, and, soon after, hiring the young technician Alfred Vail were keys to Morse’s success.
Obstacles and Opportunities
By December 1837, Morse had enough confidence in his new system to apply for the federal government’s appropriation, and during the next year he conducted demonstrations of his telegraph both in New York and Washington.
However, when the economic disaster known as the Panic of 1837 took hold of the nation and caused a long depression, Morse was forced to wait for better times. It was during this period that Morse visited Europe again and tried not only to secure patent protection overseas but to examine competing telegraph systems in England. . . .
By 1843, the country was beginning to recover economically, and Morse again asked Congress for the $30,000 that would allow him to build a telegraph line from Washington to Baltimore, forty miles away. The House of Representatives eventually passed the bill containing the Morse appropriation, and the Senate approved it in the final hours of that Congress’s last session. With President Tyler’s signature, Morse received the cash he needed and began to carry out plans for an underground telegraph line.
Realizing a Great Invention
Morse had hired the ingenious construction engineer Ezra Cornell to lay the pipe carrying the wire, and although Cornell did his job superbly, one of Morse’s partners, Congressman F. O. J. Smith, had purchased wire with defective insulation. Too much time had been wasted laying bad wire, and with the project on a rigid deadline, something had to be done quickly. Cornell suggested that the fastest and cheapest way of connecting Washington and Baltimore was to string wires overhead on trees and poles. The desperate Morse gave the go-ahead, and the line was completed in time for the dramatic and spectacularly successful link between the Supreme Court chamber of the Capitol building and the railroad station in Baltimore.
Soon, as overhead wires connected cities up and down the Atlantic coast, the dots-and-dashes method that recorded messages on a long moving strip of paper was replaced by the operator’s ability to interpret the code in real time. . . . Telegraph lines soon extended westward, and within Morse’s own lifetime they connected the continents of Europe and America.
“Invention of the Telegraph”—Public Domain/Library of Congress
legislation: Telegraph Bill
dots-and-dashes method: the short and long pulses of Morse code that are sent and received by telegraph operators
The first transatlantic electric telegraph message was sent in 1858, and by 1902 the British All-Red Line connected most of the world.
Source: U.S. Bureau of the Census. Historical Statistics of the United States, Colonial Times to 1970, Bicentennial Edition, Part 2. Washington, D.C., 1975.
Question
The idea that, in the mid-nineteenth century, the United States was mostly unaware of the possibilities of electricity is illustrated in the passage mainly through the
- Adescription of the government’s initial desire to expand a semaphore signaling system that used either flags or lights along the Atlantic Coast.
- Bdelay by the House of Representatives to pass the bill funding Morse’s telegraph line six years after he first applied for the appropriation.
- Cdiscussions of the newly invented electromagnet that sparked the idea of sending codes through wires.
- Ddescription of how an electric circuit could be closed to ring a bell at a distance.
Show the answer
Correct answer: A
The question asks for information that conveys the idea that the United States was mostly unaware of the possibilities of electricity in the mid-nineteenth century. The passage states that most signaling systems at the time were “visual or ‘semaphore’ systems using flags or lights” (paragraph 1) and that the United States was looking for “just such a system along its entire Atlantic coast” (paragraph 1).
Option A is correct because waving lights and flags reveals how limiting and simple the system of the time was, and Option A states that the United States wanted to expand this system, not improve upon it.
Option B is incorrect because the delay in funding had to do with the Panic of 1837 and the “long depression” (paragraph 5), not because the House of Representatives was not aware or ready for innovation in the use of electricity.
Option C is incorrect because it focuses on what prompted Morse to consider an electronic wire-based communications system.
Option D is incorrect because it describes a basic aspect of an early electrical discovery that demonstrated the interest of scientists in the possibilities of electricity, not the United States as a whole.
Question analysis
Students identify how “Invention of the Telegraph” mainly illustrates the idea that, in the mid-1800s, the United States was largely unaware of what electricity could do. The idea is implied rather than stated, so students must decide which detail truly reveals the nation’s thinking at the time.
- Grade level
- Grade 8 reading and task
- Compared with grade 7
- Above grade 7 Grade 7 evidence questions often match a stated idea to a sentence. This idea is only implied, so students must infer what a historical detail reveals about a whole nation’s understanding, closer to grade 8 inference.
- Estimated difficulty
- Hard: combines ideas, needs a plan, and has more than one tempting wrong answer.
- Thinking it demands
- Depth of knowledge 3, strategic thinking · mainly evaluate
- What makes it hard
- Reading between the lines moderate
- Evidence in several places moderate
- Hard words minor
- Evidence
- Answered from one paragraph or stanza
- Reading level
- Passage: about grade 11, 910 words; question and choices: about grade 12, 102 words.
- Students, last 30 days
- Not enough answers yet to show (it takes 10).
Why it is hard, traps and wrong answers (shows the answer)
Why it is hard
The stem asks about a whole nation’s understanding, so details about individuals with electrical interests, the ship’s passengers and Henry, show the opposite of what is needed. The real trap is the funding delay, which looks like official indifference but has an economic cause the passage states. Students who remember that the semaphore plan came with a remark about not knowing electricity was coming find the answer.
Reading between the lines moderate Working it out
The idea is implied: wanting a semaphore system shows unawareness only alongside paragraph 1’s comment that its framers “had no way of knowing” they would be offered electricity. (Graesser, Singer & Trabasso, 1994; Kintsch, 1998)
Evidence in several places moderate Working it out
The choices point to four separate places, paragraph 1’s semaphore plan, the funding delay of paragraphs 4 to 6, the shipboard talk in paragraph 2 and Henry’s bell in paragraph 3, and each must be checked there. (Kirsch & Mosenthal, 1990; Gorin & Embretson, 2006)
Hard words minor Understanding the question
“Semaphore” and “appropriation” are uncommon words, and the passage defines “semaphore” only in passing, as systems “using flags or lights.” (Perfetti, 2007; Freedle & Kostin, 1993)
Strategy: For each choice, find the detail in the passage and ask whether the author uses it to show what the country did or did not understand about electricity.
Traps
- Twists what the text says: Uses the text's topic and ideas but changes what it says: who did it, how much, when, or why.
- Supports only part of the claim: In a question about evidence: a line that backs one half of the claim but not the other, or a related point rather than the claim itself.
The wrong answers, classified
B Twists what the text says (King et al., 2004)
Reads the long wait for funding as doubt about electricity, but the passage gives a different cause, the Panic of 1837 and the “long depression” that followed.
C Supports only part of the claim (King et al., 2004; Thissen, Steinberg & Fitzpatrick, 1989)
The ship’s passengers did discuss the new electromagnet, but that shows a few people interested in electricity, not a country unaware of what it could do.
D Supports only part of the claim (King et al., 2004; Thissen, Steinberg & Fitzpatrick, 1989)
Henry’s bell rung at a distance is a real detail, but it shows a scientist exploring electricity’s uses, the opposite of unawareness, and says nothing about the nation.
Working it out, step by step
Figure out what the question asks
This asks which part of the passage best shows an idea. The idea is that in the mid-1800s, the United States mostly did not know what electricity could do. Look for a detail about the country as a whole, not about one scientist.
Find the detail in paragraph 1
Paragraph 1 says most early systems were visual, or semaphore, “systems using flags or lights.” Then it says, “The young American republic wanted just such a system along its entire Atlantic coast.” The next sentence explains that its lawmakers “had no way of knowing” they would be offered “an entirely new and revolutionary means of communication—electricity.”
Explain what the detail shows
A semaphore system sends signals people can see, like waving flags. The country asked for that old kind of system. It did not ask for an electric one, because it did not know one was possible. “Revolutionary” means bringing a huge change. So the government’s plan shows how unaware the nation was of what electricity could do.
Check each choice
- A fits. The government wanted to spread flags and lights, not electric signals.
- B is wrong. The delay had a money cause. The Panic of 1837 “caused a long depression.” It was not about electricity.
- C is wrong. Passengers talking about the electromagnet shows interest in electricity, the opposite of not knowing about it.
- D is wrong. Henry ringing a bell shows one scientist exploring electricity. It says nothing about the whole country.
Choose the answer
The country’s wish for a flags-and-lights system shows it did not yet see what electricity could do. So the answer is A, the description of the government’s plan for a semaphore system along the Atlantic Coast.
Why this answer and not the closest wrong one
B is the closest trap, because a long wait for money can look like doubt about electricity. But paragraph 5 gives the real cause, the Panic of 1837 and the hard times after it. A is backed by the passage’s own words: the lawmakers “had no way of knowing” electricity was coming.
More questions like this
The original DOE question
The passage “Invention of the Telegraph” as printed (pages 146–148)
