Society & Culture & Entertainment Education

The Magical Mayor

In 1965, Otto von Guericke acquired a reputation as a magician among the people of Magdeburg, Germany, where he was mayor.
Von Guericke, an engineer, was intrigued by current investigations into the nature of the atmosphere.
  He decided to demonstrate the power of atmospheric pressure by showing its effect on a container that he had emptied of air - in other words, one that contained a vacuum.
And so he built a vacuum pump, rather like a water pump except that instead of removing water it removed air.
Von Guericke had a strong streak of the showman in him, and he demonstrated the powers of his pump and of the atmosphere too, with some spectacular stunts.
The one that gave him his reputation as a magician was mounted at Magdeburg before Emperor Ferdinand III and his court.
Von Guericke had built two copper hemispheres, 510 mm (20 in) in diameter, each with a flange so accurately finished that, when the two were greased and fitted together they formed a single, airtight sphere.
He pumped the air out of this, and then harnessed a team of eight horses to each hemisphere to try to pull them apart - without success.
As soon as he let the air into the sphere again, the two halves separated easily.
In another demonstration, he pumped the air out of a large vertical cylinder fitted with a piston.
Fifty men held ropes attached via pulleys to the piston and, as the air left the cylinder, the piston sank - until the 50 men were dangling in the air.
Twenty years later, the people of Magdeburg were astonished again by von Guericke 's magical powers, when he built a water barometer attached to the side of his house.
It was a brass tube over 9 m (30 ft) high, with a sealed glass section at the top.
Passersby would see a tiny figure of a man floating high in the glass when the weather was fine, and sinking out of sight as storms approached.
SHARE
RELATED POSTS on "Society & Culture & Entertainment"
Distance Ba In Journalism And Mass Communication
Distance Ba In Journalism And Mass Communication
Learn About Roberts Wesleyan College and What It Takes to Get In
Learn About Roberts Wesleyan College and What It Takes to Get In
Going for the Green: Final Results - Harrisburg Academy
Going for the Green: Final Results - Harrisburg Academy
College Scholarship Help For Single Moms
College Scholarship Help For Single Moms
Plan For Your Next Semester
Plan For Your Next Semester
Structured Cabling Training – A great need for telecommunication operation expert
Structured Cabling Training – A great need for telecommunication operation expert
The Future of Education - Online Distance Learning
The Future of Education - Online Distance Learning
Best Practice: Preparing for College Admissions
Best Practice: Preparing for College Admissions
Online Degree in Accounting - Why You Cannot Be Out of Place With This Program
Online Degree in Accounting - Why You Cannot Be Out of Place With This Program
Virginia GED Testing Requirements
Virginia GED Testing Requirements
How to Introduce a Classmate in Speech Class
How to Introduce a Classmate in Speech Class
How to Fill Out FAFSA Forms
How to Fill Out FAFSA Forms
The Beach at Trouville - The Empress Eugenie, 1863
The Beach at Trouville - The Empress Eugenie, 1863
Idioms and Expressions - Around
Idioms and Expressions - Around
Looking For Distance Education Schools?
Looking For Distance Education Schools?
Open the Doors to a Bright Career with TV Broadcasting Training
Open the Doors to a Bright Career with TV Broadcasting Training
Beware Of Fake Diplomas - Save Yourself
Beware Of Fake Diplomas - Save Yourself
Learn Mexican History, Beyond Cinco de Mayo
Learn Mexican History, Beyond Cinco de Mayo
4 Secrets on How to Get Good Grades and Achieve Academic Success
4 Secrets on How to Get Good Grades and Achieve Academic Success
Learning the German Language - The Secret of German Language Learning
Learning the German Language - The Secret of German Language Learning

Leave Your Reply

*