and hypochondriasis were only responsible for a very few limited and obstinate cases. The principal causes here were:? (?) Bad water. (?) Bad food. As regards bad water, two kinds of water were responsible for the disease :? (a) Muddy water. (b) Water containing in solution mineral salts such as magnesia, mica, etc. The first kind of water was the cause of the disease in the G-omal Valley. Thou...