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.
obturator â(plural obturators) ( 1 surgery) An object used to obstruct a hole, such as a fissure of the palate. ( 2 engineering) Valve closure member (disk, gate, plug, etc.). ( 3 ordnance) Any device for preventing the escape of gas through the breech mechanism of a breech-loading gun; a gas check. ( photography) A camera shutter.