Sentence:  When a philosopher condescends to regard commonplace man, he assumes much the attitude that a dandy might if brought, perforce, into contact with some one suspected of being <WSD>pedicular</WSD>. 
Meaning of the word marked with <WSD> tags:  Having the lousy distemper, phthiriasis<ref>(Thomas Sheridan), "A Complete Dictionary of the English Language," London: C. Dilly, 1789: “<small>PEDICULAR</small>, Having the phthyriasis or lousy distemper.”[https://catalog.hathitrust.org/Record/012290639]</ref>; infested with lice.