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Mercantile Library Company (Philadelphia)

Mercantile Library Company (Philadelphia) is a engineering 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 Mercantile Library Company (Philadelphia) rather than just read about it. In short: The Mercantile Library Company was a library in Philadelphia, Pennsylvania, United States, that operated from 1821 to 1989. Like other "Mercantile Libraries" of the era, it was originally a subscription library focused on serving merchants, but gradually shifted focus over time to serve more as a public library, and ultimately became a freely-accessible branch of the Free Library of Philadelphia.

Mercantile Library Company (Philadelphia) — main illustration
Mercantile Library Company (Philadelphia) — illustration

Key takeaways

  • Mercantile Library Company (Philadelphia) belongs to engineering; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Mercantile Library Company (Philadelphia) to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Mercantile Library Company (Philadelphia) from memory before moving on to harder problems.

Reference excerpt

The Mercantile Library Company was a library in Philadelphia, Pennsylvania, United States, that operated from 1821 to 1989. Like other "Mercantile Libraries" of the era, it was originally a subscription library focused on serving merchants, but gradually shifted focus over time to serve more as a public library, and ultimately became a freely-accessible branch of the Free Library of Philadelphia. The library moved to three different locations during its 168 years of existence, but only the third library building, opened in 1952, still stands; this building was added to the Philadelphia Register of Historic Places in 1990.

History

The Mercantile Library was founded in 1821. In 1845, after years of having impermanent locations, it housed itself at the Mercantile Library building on Fifth Street. Per its name, the library was primarily intended to serve merchants with documents on trade, business, and commerce, though library catalogs from later in the century indicate the library soon held books on other subjects. In 1869, the library's growing membership and book collection prompted a move to another location on Tenth Street. In 1877, the Mercantile Library building caught fire when a blaze from the neighboring Fox's American Theatre spread to its roof, and some of the library's collection was damaged from the fire as well as from water used in firefighting efforts by the Philadelphia Fire Department. By the 1880s, the Mercantile Library had long since become considerably popular outside its original membership base of merchants, and the librarians chose to lean into this and curate expanded novel collections to match public demand, though they were especially selective to enforce public morality at the time. At an indeterminate point after 1894, the Mercantile Library was absorbed into the Free Library of Philadelphia and became a public library branch. In 1952, the Mercantile Library moved to a newer building at 1021–1023 Chestnut Street, the site of the former Chestnut Street Opera House. In 1989, after 168 years of operation, the Mercantile Library was forced to close after asbestos was discovered in the building. The Free Library of Philadelphia absorbed the collections of the Mercantile Library after its closure.

Architecture Initially, the Mercantile Library was housed at multiple different locations that are not clearly known and may no longer exist. From 1845 to 1869, the library was housed in a dedicated Greek Revival building at 125 South Fifth Street and Library Street, designed by William L. Johnston. After the library moved to its second location in 1869, the first building at Fifth Street was converted into offices, purchased by Horatio Nelson Burroughs in the 1870s as the Burroughs Building, and eventually demolished in 1925. Its former location is now an open area in Independence National Historical Park, with nothing indicating there was once a building there. The second Mercantile Library building was opened in 1869, designed by Frank Furness. The library was converted out of a disused market building and was renovated by Furness twice, first in 1873 (with George W. Hewitt) and again after the fire in 1877. When the library moved to the Chestnut Street building in 1952, the now-vacant second building, which was located somewhat nearby, was demolished to construct a large parking garage for the area. The third Mercantile Library building at 1021–1023 Chestnut Street was a two-story Modern building with a clean windowed front, designed by Martin, Stewart & Noble.

Legacy The third and final Mercantile Library building is still standing at 1021 Chestnut Street, but remains vacant and boarded up. It was placed on the Philadelphia Register of Historic Places in 1990, and was the first mid-20th century building on the list.

See also John Edmands (librarian) List of libraries in 19th century Philadelphia

References

External links

William Ellery Channing. An address, delivered before the Mercantile Library Company of Philadelphia, May 11, 1841 Bookplate of the Mercantile Library Company, via Flickr Illustration of the library in Frank Leslie's Illustrated Newspaper, 1869 (via US Library of Congress)

Illustrations

Mercantile Library Company (Philadelphia) illustration
Mercantile Library Company (Philadelphia): The first Mercantile Library building at Fifth Street and Library Street in 1868.[3]
The first Mercantile Library building at Fifth Street and Library Street in 1868.[3]

Worked examples

Example 1 — a first encounter with Mercantile Library Company (Philadelphia)

Start with the simplest possible case. Write down what Mercantile Library Company (Philadelphia) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, 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 Mercantile Library Company (Philadelphia) 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 Mercantile Library Company (Philadelphia) 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 Mercantile Library Company (Philadelphia)

In research
Mercantile Library Company (Philadelphia) appears in engineering 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 Mercantile Library Company (Philadelphia) 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
Mercantile Library Company (Philadelphia) is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1821 establishments in Pennsylvania, 1989 disestablishments in Pennsylvania, Buildings and structures completed in 1845, so understanding it makes those chapters shorter.
In everyday life
Look for Mercantile Library Company (Philadelphia) 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 Mercantile Library Company (Philadelphia) in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Mercantile Library Company (Philadelphia) 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 Mercantile Library Company (Philadelphia) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Mercantile Library Company (Philadelphia) in simple terms?

The Mercantile Library Company was a library in Philadelphia, Pennsylvania, United States, that operated from 1821 to 1989. Like other "Mercantile Libraries" of the era, it was originally a subscription library focused on serving merchants, but gradually shifted focus over time to serve more as a p…

Why does Mercantile Library Company (Philadelphia) matter?

Because it connects several engineering 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 Mercantile Library Company (Philadelphia)?

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 Mercantile Library Company (Philadelphia).

Tags

  • 1821 establishments in Pennsylvania
  • 1989 disestablishments in Pennsylvania
  • Buildings and structures completed in 1845
  • Buildings and structures completed in 1952
  • Buildings and structures demolished in 1925
  • Buildings and structures demolished in 1952
  • Defunct libraries in the United States
  • Demolished buildings and structures in Philadelphia
  • History of Philadelphia
  • Libraries disestablished in the 1980s
  • Libraries in Philadelphia
  • Library buildings completed in 1869

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