"Things You Wouldn't Know If We Didn't Blog Intermittently."
27 April 2012
How to make a "naked egg"
Soak a raw egg in vinegar, where the acetic acid will dissolve the calcium in the shell. A series of photos are posted at Izismile without credit to the source*. Exploratorium has a discussion with some details of the process.
* (if anyone knows the original source, leave a comment and I'll switch the link)