Observations of highly localized oscillons with multiple crests and troughs

Two types of stable, highly localized Faraday's resonant standing waves with multiple crests and troughs are observed in the alcoholic solution partly filled in a Hele-Shaw cell vertically oscillated with a single frequency. These oscillons have never been reported. Systematical experiments are performed to investigate the properties of these ocsillons. Especially, some experiments are performed, for the first time, to indicate the high localization of the oscillons, which suggest that these oscillons may be regarded as a combination of the two elementary oscillons discovered by Rajchenbach et al. (Physical Review Letters, 107, 2011), for instance, (2,3) = (1,1) + (1,2), where ($m,n$) denotes oscillon with m crests and n troughs. So, our experiments also reveal an interesting, elegant "arithmetic" of these oscillons.