Its pH changes very little when a small or moderate amount of strong acid or base is added to it and thus it is used to prevent changes in the pH of a solution. Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications.
The Wizard of Oz movie musical premieres in Oconomowoc, Wisconsin. The Wizard of Oz, starring Judy Garland and featuring words and music by E.Y. âYipâ Harburg and Harold Arlen, receives its world premiere in Oconomowoc, Wisconsin, on this day in 1939.
The Wizard of Oz was filmed that way to give it the Over the Rainbow effect. The Black and White parts were actually filmed on Sepia Tone film, It has a more brownish tint to it. Which if you have the DVD you will see the true color of the Sepia Tone. The color parts of the movie were filmed on 3 strip Technicolor film. It was extremely expensive back then but they decided to do it right. The Wizard Of Oz was NOT the first color movie, there were quite a few others before. Where the black and white turns to color those few frames on the film were hand painted to give the transition a smooth effect (where Dorothy is looking out of the house door).