“…This became worse during the summer and gradually cleared up after the frost. In 1930In , 1931In and 1932 he suffered from a repetition of the same process. He stated, however, that at one time during the height of the eruption, when it was so bad that it necessi¬ tated the discontinuance of his work, the eruption temporarily cleared up only to relapse on the resumption of his occupation.…”