Cell salts, sometimes known as tissue salts, were developed by Wilhelm Heinrich Schuessler 1821 – 1889. They consist of the very basic minerals that our cells depend on for balance.
There is a great PDF download about cell salts on the celletech web site. Here is the link: http://www.brighterdayfoods.com/PDFDocs/l/LR72WHCKJQ1V9LTGKT8CGWX7TM5B1NP5.PDF
I enjoy doing business with the Celletech Company, located in Wisconsin. http://www.celletech.com/default.jsp They provide the remedies in amber glass bottles, which you can either recycle or use for something else when done. They offer a huge selection of homeopathic remedies.
There is another quick chart HERE on cell salts.
Wikipedia has a pretty good explanation HERE.
There is a biography of Dr. Schuessler HERE