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Updated: May 18, 2025
The slides were moistened, one was laid on a stone, one on a clod, and a third on the grass. Returned to bed, not having been gone over ten minutes. At 6 A.M. collected and examined for specimens the drops of dew deposited. Results: In every one of the five instances collected the automobile spores, and the sporangia of the gemiasmas and the protuberans on both sides of slides and beaker.
Gelatinous masses, allied to the protuberans, of a light yellow color scattered all over with well developed spores, larger than those found in the Protuberans. One or two oval sporanges with double outlines. This observation was repeated, but the specimens were not so rich. Another specimen from the same locality was shown to be made up of mosses by the venation of leaves.
Some very thick, long, green, matted marsh grass was carefully separated apart like the parting of thick hair on the head. A little earth was taken from the crack, and the Protuberans lamella, the Gemiasma rubra and verdans found were beautiful and well developed. Observation 31. Brooklyn Naval Hospital, August 12, 1877, 4 A.M. Called up by the Quartermaster.
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.
Examined a spot one inch in diameter, raised in center, green, found Oedegonium abundant. Some desmids, Cosmarium binoculatum plenty. One or two red Gemiasmas, starch, Protuberans lamella, Pollen. Specimen soft magma of the pool margin. Oedogonium abundant, spores, yeast plants, dirt. Sand scraped. No organized forms but pollen, and mobile spores of some cryptogams. Dew on grass.
Found the same. Observation 3. Found the same. Observation 4. Salt marsh below the railroad bridge over the river. The scrapings of the soil showed beautiful yellow and transparent Protuberans, beautiful green sporangias of the Gemiasma verdans. Observation 5. Near the brook named was a good specimen of the Gemiasma plumba.
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.
First Studies to find in their natural habitat the palmellae described as the Gemiasma rubra, Gemiasma verdans, Gemiasma plumba, Gemiasma alba, Protuberans lamella. Second Outfit. Glass slides, covers, needles, toothpicks, bottle of water, white paper and handkerchief, portable microscope with a good Tolles one inch eyepiece, and one-quarter inch objective.
Found the area abundantly supplied with palmellae, Gemiasma rubra, verdans, and Protuberans lamella, even where there was no incrustation or green mould. Made very many examinations, always finding the plants and spores, giving up only when both of us were overcome with the heat. Observation 34. August, 1881. Visited the Wallabout; found it filled up with earth. August 17.
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.
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