The Burner That Changed the Laboratory
A chemist studying a substance in the 1800s faced a problem that sounds simple: how could it be heated without the flame getting in the way? A bright, smoky flame could leave soot on equipment and make it difficult to see the colors given off by a heated sample. A better burner would help turn heat from an unpredictable nuisance into a more useful scientific tool.
One answer became known as the Bunsen burner. Its story involves Robert Bunsen, a German chemist, and Peter Desaga, a skilled instrument maker. Their work helped make laboratory heating cleaner and more controllable—and opened the way for discoveries about the chemical elements.
A laboratory in Heidelberg
Robert Bunsen was born in 1811 in Göttingen, in what is now Germany. By the 1850s, he was a professor of chemistry at the University of Heidelberg. The university was developing a new chemistry laboratory, and Bunsen wanted equipment suited to careful research and teaching.
Bunsen did not invent the idea of mixing gas and air before burning it. Other people had explored similar designs. Around 1855, however, Desaga built a burner for Bunsen’s Heidelberg laboratory that made practical use of that principle. The burner later became associated with Bunsen’s name, even though the work of an instrument maker was essential to its construction.
- luminous:
- Giving off light or appearing bright.
- concentrated:
- Focused in a relatively small area.
- residue:
- Material left behind after a process.
- regulating:
- Controlling or adjusting something.
- repeatability:
- The ability to do something again under similar conditions.
- uncertainty:
- A lack of complete knowledge or confidence about a result.
- distinctive:
- Having a feature that makes something recognizable or different.
- analysis:
- Careful examination of something to understand it.
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Preview questions from this passageShowHide
- 1How did smoky flames interfere with laboratory work?
- 2Why was Desaga’s contribution essential even though the burner carries Bunsen’s name?
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About this explanatory article passage for Middle School
“The Burner That Changed the Laboratory” is a explanatory article reading passage about Science History, written for Middle School. It takes about 5 minutes to read (696 words) and comes with an interactive quiz and a printable worksheet with comprehension questions and an answer key.