In order to re-embody to figure and abstract typology of rhythms, this set of graphs aims to trace the lifetime a well-identified sign for each rhythmic profile as described in the related table (see "Related Document"). On this graph, five case studies have been selected to embody the "K" profile (unknown duration).

The measurements are based on the regular lists of signs that Claude Neon Lights sent to the French Municipal Council between December, 20 1935 and December, 31 1937, plus a few scattered signs recorded in other files in the Shanghai Municipal Archives (French concession and International Settlement in 1931 and 1941).  Source: SMA (FC), U38-4-1114; SMA (SMC), U1-14-3261 (0246).