Observation 29. The dry white incrustation found on fresh earth near
railroad track entirely away from water, where it appeared as if
white sugar or sand had been sprinkled over in a fine dust, showed
an abundance of automobile spores and dry sporangia of G. rubra and
verdans. It was not made up of salts from evaporation.

Observation 30. 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. With Surgeon C. W. White, U.S.N., took (A) one
five inch glass beaker, bottomless, (B) three clean glass slides, (C)
chloride of calcium solution, [symbol: dra(ch)m] i to [symbol: ounce] i
water. We went, as near as I could judge in the darkness, to about that
portion of the wall that lies west of the hospital, southeast corner
(now all filled up), where on the 10th of August previously I had found
some actively growing specimens of the Gemiasma verdans, rubra, and
protuberans. The chloride of calcium solution was poured into a glass
tumbler, then rubbed over the inside and outside of the beaker. It was
then placed on the ground, the rim of the mouth coming on the soil and
the bottom elevated on an old tin pan, so that the beaker stood inclined
at an angle of about forty-five degrees with the horizon. 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