science

Hemingray Glass Company

Hemingray Glass Company is a science 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 Hemingray Glass Company rather than just read about it. In short: The Hemingray Glass Company was an American glass manufacturing company founded by Robert Hemingray and Ralph Gray in Cincinnati in 1848. In its early years, the company went through numerous and frequent name changes, including Gray & Hemingray; Gray, Hemingray & Bros.; Gray, Hemingray & Brother; Hemingray Bros. & Company; and R.

Key takeaways

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

Reference excerpt

The Hemingray Glass Company was an American glass manufacturing company founded by Robert Hemingray and Ralph Gray in Cincinnati in 1848. In its early years, the company went through numerous and frequent name changes, including Gray & Hemingray; Gray, Hemingray & Bros.; Gray, Hemingray & Brother; Hemingray Bros. & Company; and R. Hemingray & Company before incorporating into the Hemingray Glass Company, Inc. in 1870. The Hemingray Glass Company had factories in Cincinnati and Covington, Kentucky with main production in Muncie, Indiana. Although Hemingray was best known for its telegraph insulators, the company produced many other glass items including bottles, fruit jars, pressed glass dishes, tumblers, battery jars, fishbowls, lantern globes, and oil lamps. In 1933, the Owens-Illinois Glass Company purchased the company, but the Hemingray name was retained at the production facility in Muncie. The main plant in Muncie closed in 1972, and the company ceased producing insulators. The complex is now used by Gerdau Ameristeel, a steel production company headquartered in Brazil.

Insulators Hemingray was best known for producing telegraph and telephone pin insulators used on utility poles. To give an overview of the large variety of styles produced, the following table contains the twenty most common. The table provides two numbers: the Consolidated Design (CD) number and the style number. The CD number is from a classification system developed by collectors that refers to the shape of the insulator, and is independent of the Hemingray Glass Company. However, the style number (or name) was assigned by Hemingray to each insulator. Due to slight modifications in design over years of production, single styles can span multiple CD numbers.

Illustrations

Worked examples

Example 1 — a first encounter with Hemingray Glass Company

Start with the simplest possible case. Write down what Hemingray Glass Company claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Hemingray Glass Company 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 Hemingray Glass Company 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 Hemingray Glass Company

In research: Hemingray Glass Company appears in science 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 Hemingray Glass Company 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: Hemingray Glass Company is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1848 establishments in Ohio, 1966 disestablishments in Indiana, Defunct glassmaking companies, so understanding it makes those chapters shorter.
In everyday life: Look for Hemingray Glass Company 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 Hemingray Glass Company in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Hemingray Glass Company means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Hemingray Glass Company out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hemingray Glass Company in simple terms?

Why does Hemingray Glass Company matter?

Because it connects several science 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 Hemingray Glass Company?

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 Hemingray Glass Company.