FireChat may catch on as a way to corral revelers, but that's just the beginning of its practical applications. For political organizers, it could become a critically important way to keep protesters and activists connected when their traditional forms of communicating get cut off.
Desiccators are sealable enclosures containing desiccants used for preserving moisture-sensitive items such as cobalt chloride paper for another use. A common use for desiccators is to protect chemicals which are hygroscopic or which react with water from humidity.
In other words, desiccators are used to dry any chemicals that may be used in reactions. Desiccators are usually sealed so that outside air cannot enter the chamber. In some cases, desiccators may also be fitted with a vacuum hose in order to remove excess air from the inside of the chamber.