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Hi. Can you help me with this sentence of "the ambitious guest"? and what's the meaning of artery here? "The romantic pass of the Notch is a great artery, through which the life-blood of internal commerce is continually throbbing between Maine, on one side, and the Green Mountains and the shores of the St. Lawrence, on the other." and this is the paragraph of the story: The daughter had just uttered some simple jest that filled them all with mirth, when the wind came through the Notch and seemed to pause before their cottage--rattling the door, with a sound of wailing and lamentation, before it passed into the valley. For a moment it saddened them, though there was nothing unusual in the tones. But the family were glad again when they perceived that the latch was lifted by some traveller, whose footsteps had been unheard amid the dreary blast which heralded his approach, and wailed as he was entering, and went moaning away from the door.Though they dwelt in such a solitude, these people held daily converse with the world. The romantic pass of the Notch is a great artery, through which the life-blood of internal commerce is continually throbbing between Maine, on one side, and the Green Mountains and the shores of the St. Lawrence, on the other.
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Artery used here is somewhat of a metaphor.

An artery is a major highway, river, or lines that carries a lot of traffic (trucks, cars, ships, barges, trains, etc).
Trading and shipping of products and raw materials is the "life-blood" of an economy. It is what keeps an economy healthy and growing.

The metaphor is like the major blood vessels in animals that keep them healthy.
AlpheccaStars thank u:)
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Crawford Notch is the steep and narrow gorge of the Saco River in the White Mountains of the US state of New Hampshire.To early settlers, crossing through this gorge was the easiest and least dangerous way to get from New Hampshire and Maine through to the Green mountains and the Saint Lawrence river on the other side. The Saint Lawrence is a large river with access to the Atlantic ocean and is, to this day, an important commercial waterway. Goods that arrived from Europe and other countries via the Saint Lawrence had to be transported inland. This was accomplished by passage through "the Notch." Just like an artery brings blood to your heart to be pumped for oxygenation in your lungs, the Notch brought commerce to the interior areas of New England so that towns could be settled and people could make their lives. Without the ability to pass through the Notch, getting things to where they were needed would have involved greater distances and, probably, higher costs. The Notch was necessary to sustain life in the developing wilderness. The photo below is of a painting of the Crawford Notch. Many say that its romantic style portrays the Notch as mystic and exciting (romantic). http://www.nga.gov/education/classroom/19th_century_america/art_crawfordnotch.shtm
[broken link to an image removed]
thank you JohnParis
full explanation thanks so much
You're welcome farbia - I am so sorry the image did not display as I had wished. Here is the link: http://www.nga.gov/education/classroom/19th_century_america/art_crawfordnotch.shtm
Students: We have free audio pronunciation exercises.
that's ok my friend. thank u. I checked the website:)