CASE I.--"A lady living in the lower part of the city, where the rain always leaves constant channels of infection, was suffering with _daily attacks of intermittent_, which grew more intense every day. She received 1 gram of the salt, divided in six powders, to be taken one every hour after the attack. The next day she had no chill, and the thermometer indicated the absence of fever. She was nursing at the time, and stated that she had noticed a marked increase of milk in her breasts; 50 centigrams more, in doses, were given to her, and the fever did not return again." CASE II.--"A tailor, 30 years of age, had moved to the lower part of the city and contracted a _tertian intermittent_. He had four paroxysms before the doctor saw him, the last one being _attended by much pain in the left hypochondrium_. He received 1 gram, in 5 doses. There was apyrexia on the day the attack was due, and this did not return again. This man continued to live in the same house, under the same regimen and hygienic conditions." CASE III,--"A little girl, 6 years of age, lymphatic constitution, living near the beach of the harbor, was brought to Dr. Ramirez Tovar's clinic, suffering for 17 days with _malaise, loss of appetite, sleepiness and fever_. She had taken quinine, both internally and externally, with little benefit, and _was wasting away notably_. At 4 P.M. she commenced to take 50 centigrams of the salt, in 8 doses, and the next day at the same hour the thermometer indicated a fall from 39.5° C. of the previous day to 38.5° C. The mother was ordered to repeat the medicine at longer intervals, but for want of means the child did not take any more. On the 4th or 5th day the temperature went up to 39.5° again, then she was provided with the medicine, and 3 days later the temperature was normal. The action of the alkaloid was aided here by a tonic wine prepared from the extract of the plant."