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 pair for a residence permit for this purpose. Au pairing has long been a favored way for young women to learn French and, increasingly, for young men as well. The pocket money for au pairs in France is Euro 60 per week, plus, in most cases, a 20 euro a week contribution to language classes; in Paris families may also provide a carte Navigo (urban travel pass) which is worth 95 euros (approximately). Enrollment in a French language course is compulsory for non-European au pairs. While France does not have an official, government sponsored Au Pair Program, a number of established