Home Experiments Pasteur Swan Neck Flask Experiment

Pasteur Swan Neck Flask Experiment

Tuesday, 03 January 2012 09:56

In his famous experiment, Louis Pasteur used a special flask whose neck was shaped like an S or the neck of a swan, hence the name "Swan Neck Flask." He put a nutrient rich broth in the flask, which he called the "infusion." He then boiled the infusion killing any microorganisms which were already present. Then he allowed the infusion to sit.

Louis Pasteur Experiment

Because of the shape of the flask, the infusion was exposed to air. However, dust particles and other things in the air never made it into the infusion. Because they were trapped in the curve of the Swan Neck Flask. No matter how long he allowed the flask to sit, microorganisms never appeared in the infusion. However, if he tipped the flask and allowed the things trapped in the neck to get into the infusion then microorgranisms began to appear in the infusion and multiply rapidly. This demonstrates that microorganisms do not appear as a result of Spontaneous Generation. Instead, they are introduced into food through dust particles and other things that happen to land on the food.

 
 

Education Pays

Bachelor degree graduates earn $400 more per week than high school graduates on average.

online-degrees

Featured Book

LOUIS PASTEUR by patrice debré

Louis Pasteur

Louis Pasteur was more than just a man; in the words of his latest biographer he was "a living symbol, embodying both science and France." Written for the centenary of Pasteur's death, this book is a comprehensive, insightful examination of his life and work, made far more interesting and accessible by the author's natural flair for describing the details of scientific research with simple, compelling prose.

Pasteur Gear

-=View all Team Pasteur Products=-


Chance Favors the Prepared Mind

Louis Pasteur - Chance Favors the Prepared Mind

Louis Pasteur Preparedness T-Shirt

Chance Favors the Prepared Mind


Germ Killer T-Shirt

Real Scientists Drink Beer


Louis Pasteur "Real Scientists Drink Beer" Coasters

Pasteur Drink Coaster

Pasteur Biography

louis_pasteur_delivering_first_rabies_inoculation_on_joseph_meister_20090420_1148554081Louis Pasteur was a microbiologist and chemist from Dole, France. Learn more about his childhood, history at the university and his ground-breaking work that led to the development of modern medicine. We owe the creation of vaccinations, pasteurization and many more applications of science to Louis Pasteur.

Read Louis Pasteur's full biography...

Link to Us

Choose from various images to place on your website.