Dr. Freire also examined some soil from the cemetery of Jurujuba, where victims of the yellow jack (as we call this fever sometimes) lie interred. Some of this earth was dried and then placed in a cage which contained a guinea pig. Previously to the introduction of the earth, the blood of the animal was examined microscopically, and found to contain no bacteria of any kind. The animal became ill, and died within five days. When its tissues were examined after death, they were found to present all the characteristic changes which yellow fever brings about. The blood was full of _cryptococci xanthogenici_ in various degrees of development. The urine was highly albuminous. The brain and the intestines were stained yellow by the infiltration of the coloring matter of the _cryptococci_. After this discovery, the doctor recommended that all victims of yellow fever be destroyed by fire, to prevent general infection. The Brazilian government (one of the most enlightened in the world) immediately ordered that a cremation furnace be built at Jurujuba, in which all those that die of yellow fever there must be incinerated. The St. Louis _Medical and Surgical Journal_ makes this very sensible suggestion regarding the disposition of the remains of those dying of yellow fever in our own United States. It says:— “From what we have learned from private sources, the resurrection of the bodies, during the winter months, of those who died of yellow fever, has done much to perpetuate this terrible disease in southern cities, until the warm weather has set in. Cremation obviates all possible harm that can come from the dead, and duty to the living demands that everything be done to destroy the possibility of propagating this and all contagious diseases that run so malignant a course.” Dr. J. F. A. Adams says:—