More Pictures from DC

These photos were taken by the official photographers of the USA Science and Engineering Festival.  Since they just put the link up, I thought I'd share.  Here are a few highlights:

--Check out this picture to see how much sugar is in a bottle of orange soda (count the Life Savers on the white scale in the bottom right corner).  On the right you can see the chromatography setup--each clothespin held a paper in the water.  (At home you can just fold the paper to stand it up, fold the top of the paper over the lip of the cup, or attach it to a pencil laid over the top; this was mass-production chromatography.

--This picture shows my daughter demonstrating how sour Warheads are.  She's only 7 1/2, but she worked at the booth as many hours as I did.