Jews were not allowed to attend public baths with Muslims or even to go outside in rain or snow, ostensibly because some impurity could be washed from them upon a Muslim.[32] Jews were often only permitted to pursue trades that were undesirable to the general Muslim population. They were expected to "undertake dirty work of every kind." Examples of such professions included dyeing (which contained strong unpleasant odors), scavenger work, cleaning excrement pits, singers, musicians, dancers and so on.[33] By 1905, many Jews of Isfahan were trading opium.