How does Tom mock Wilson?

In Chapter Eleven, the twins arrive at Wilson's home and he entertains them with some passages from his calendar. The group is soon interrupted by Tom, who drops in and joins the party. Tom intentionally gets under Wilson's skin, bringing up his failure to get his law practice off the ground and then turning to Wilson's odd hobbies. He begins by mentioning the fingerprint collection, to which Luigi and Angelo add their own marks. Tom then discusses Wilson's penchant for palmistry. Wilson's pride is saved, however, by the twins' claim that they not only consider palmistry a serious science, but have also had their palms accurately read in the past.