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Updated: June 21, 2025
Good specimens of Gemiasma rubra. Innumerable spores present in all specimens. Observation 13. Very good specimens of Protuberans lamella. Observation 14. The same. Observation 15. Dead Gemiasma verdans and rubra. Observation 16. Collection very unpromising by macroscopy, but by microscopy showed many spores, mature specimens of Gemiasma rubra and verdans. One empty specimen with double walls.
Dried clay on margin of the river showed dry G. verdans. Observation 28. Saline dust on earth that had been thrown out during the setting of a new post in the railroad bridge showed some Gemiasma alba. Observation 29.
I saw you take the blood from the forearm of an ague patient, and under the microscope I saw you demonstrate the gemiasma, white and bleached in the blood.
It would seem from this that the life epoch of a gemiasma is one day under such circumstances, but I have known them to be present for weeks under a cover on a slide, when the slide was surrounded with a bandage wet with water, or kept in a culture box. The plants may be cultivated any time in a glass with a water joint.
Near by, amid much rubbish, one or two so-called Gemiasmas; white, clear, peripheral margin. Observation 3. Green deposit on decaying wood. Oscillatoriaceae. Protuberans lamella, Gemiasma alba. Much foreign matter. Mr. Russell, Mrs. R., Miss R., residents of Magazine Grounds presented no ague plants in their blood. Sergeant McGrath, Mrs.
Since I have photographed the Gemiasma, and studied their biology, I feel like holding on to your dicta until upset by something more than words. In relation to the belief that no Algae are parasitic, I would state on Feb. 9, 1878, I examined the spleen of a decapitated speckled turtle with Professor Reinsch.
F represents a ripe plant after its spore and embryonic plant contents are all discharged, leaving behind only a few actively moving spermatia, which are slowly escaping. G represents the emptied plant in a quiescent state. Figs. A, B, C represent an unusually large variety of the Gemiasma verdans. This species is usually about the size of the rubra.
Observation 17. Dry land by the side of railroad. Protuberans not abundant. Observation 18. From side of ditch. Filled with mature Geraiasma verdans. Observation 19. Moist earth near a rejected timber of the railroad bridge. Abundance of Gemiasma verdans, Sphaerotheca Diatoms. Observation 20. Scrapings on earth under high grass. Large mature specimens of Gemiasma rubra and verdans. Many small.
Observation 21. Same locality. Gemiasma rubra and verdans; good specimens. Observation 22. A dry stem of a last year's annual plant lay in the ditch not submerged, that appeared as if painted red with iron rust. This redness evidently made up of Gemiasma rubra dried. Observation 23. A twig submerged in a ditch was scraped.
Dr. Cutter writes me September 28, 1882: "My dear Professor: By this mail I send you a specimen of the Gemiasma rubra of Salisbury, described in 1862, as found in bogs, mud holes, and marshes of ague districts, in the air suspended at night, in the sputa, blood, and urine, and on the skin of persons suffering with ague. It is regarded as one of the Palmellaceae.
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