6. Dr. B. traced five cases of ague, in connection with Dr. Safford's plants found in a cesspool of water in a cellar 100 feet distant. It is described as a plant to be studied with a power of 200 diameters, and consisting of a body and root. The root is a globe with a central cavity lined with a white layer, and outside of these a layer of green cells. Diameter of largest plant, one-quarter inch. Cavity of plant filled with molecular liquid. Root is above six inches in length, Dr. B. found the white incrustation; he secured the spores by exposing slides at night over the malarious soil resembling the Gemiasmas. He speaks of finding ague plants in the blood, one-fifteen-hundredth of an inch in diameter, of ague patients. He found them also in his own blood associated with the symptoms of remittent fever, quinine always diminishing or removing the threatening symptoms. Professors Babcock and Munroe, of Chicago, call the plants either the Hydrogastrum of Rabenhorst, or the Botrydium of the Micrographic Dictionary, the crystalline acicular bodies being deemed parasitic. Dr. B. deserves great credit for his honest and careful work and for his valuable paper. Such efforts are ever worthy of respect. There is no report of the full development found in the urine, sputa, and sweat. Again, Dr. B. or Dr. Safford did not communicate the disease to unprotected persons by exposure. While then I feel satisfied that the Gemiasmas produce ague, it is by no means proved that no other cryptogam may not produce malaria. I observed the plants Dr. B. described, but eliminated them from my account. I hope Dr. B. will pursue this subject farther, as the field is very large and the observers are few. When my facts are upset, I then surrender. "NOTES ON MARSH MIASM (LIMNOPHYSALIS HYALINA). BY ABR. FREDRIK EKLUND, M.D., STOCKHOLM, SWEDEN, PHYSICIAN OF THE FIRST CLASS IN THE SWEDISH ROYAL NAVY. [Footnote: Translated from the _Archives de la Medecine Navale_, vol. xxx., no. 7, July, 1878, by A. Sibley Campbell, M.D., Augusta, Ga.]