Chemical Corps affiliation with the corps. The Chemical Corps branch insignia consists of a cobalt blue, enamel benzene ring superimposed over two crossed gold retorts. The branch insignia, which was adopted in 1918 by the fledgling Chemical Service, measures .5 inches in height by 1.81 inches in width. Crossed shells with a dragon head was also commonly used in France for the Chemical service. The Chemical Warfare Service approved the insignia in 1921 and in 1924 the ring adopted the cobalt blue enamel. When the Chemical Warfare Service changed designations to the Chemical Corps in 1946 the symbol was retained. The regimental
.au locale they serve. .cc, for example, is now operated by VeriSign. .hm represents a nature preserve with no human inhabitants. There are also two geographic top-level domain names assigned to Australia in which are used by individuals and businesses within a particular region, they are: .au .au is the Internet country code top-level domain (ccTLD) for Australia. It was first created on 5 March 1986. Domain name policy is managed by .au Domain Administration (auDA). As of July 2018, the registry is currently operated by Afilias. The domain name was originally allocated by Jon Postel, operator of IANA to Kevin