Page:The growth of medicine from the earliest times to about 1800.djvu/441

 attempts to extract the foreign body had failed until the sprouting had caused the seed to split. Finally, there is recorded the case of a young man into whose nasal passage a leech had penetrated, while he was bathing, and had then taken up its abode far back in the canal. Donato, by aid of direct sunlight, "discovered the creature in that part where the nasal channel merges into the oral cavity." Presumably he succeeded in removing the animal, but the text quoted by von Gurlt (Vol. II., p. 517) furnishes no further particulars.