Our conclusion in duplicating Pasteur's experiment was, the soup boiled in the glass flask for at least one minute with curved tubing did not allow bacteria to enter the flask and allow for spoilage.  In the other two flasks the soup which was not boiled and had a vertical glass tube piece out of the stopper, spoiled forming a scaly scum on the surface of the soup and had a foul odor.  The second soup flask which was also not boiled, but contained a curved, glass tube top with a piece of cotton inserted in the tubing also formed a foul smell and the soup became cloudy.  In conclusion, we found boiling the soup and having a curved, glass tube top kept the soup fresher.