William Odling constructs a grouping based on analgous properties. He finds a relationship between four of his thirteen groups.
Odling revises his system to contain 57 elements (Newlands had only used 24), and arranges them in order of increasing atomic weight. Definite groups and subgroups aand gaps in the series (which may have been predictions of undiscovered elements) were the main features of this system. However, he could not explain the relationships his table showed, assuming it would have to include valence.