ABSTRACT To the Editor:— The review by Montgomery and Casper of dermatophytosis and onychomycosis (The Journal, May 12, p. 77), as do so many papers on this subject, gives one the impression that these fungous infections can be cured without unusual difficulty. One notes in the discussion, however, Dr. Montgomery's confession that "the majority of extensive cases (of Trichophyton purpureum infection) are arrested and not cured." Unfortunately it is by these rebellious and longstanding cases that therapeutic skill is measured. For this reason it may be desirable to direct attention to two methods of treatment not mentioned in Dr. Montgomery's paper.The first of these is freezing of the affected skin areas with ethyl chloride (South. M. J.23:1128 [Dec.] 1930). This method of treatment is regarded by some competent authorities as "probably the most effective single therapeutic agent."The second method deals with chronic (toe) onychomycosis of the T.