I am really very new to chemistry and physics, although I hope to study in the future. I have a question regarding chemical clocks. Is it possible to gage time using a specific chemical clock or chemical reaction that you may know of? my first,idea was standard chemical clocks like the Briggs-Rauscher reaction. perhaps slowing it down as much as possible so it changed colors on the hour mark. My second idea was maybe doing something with rust. The main problem would be controling the temperature, also I would have to replenish the ingredients and set it up again after the few hours ran out. Any ideas direction or suggestions would be appreciated. I'd like to set up some kind of chemical time telling device. I hope this isn't too crazy. Thanks!