projected by the sun on the wall and sketched by the artist on the wall,
putting the details in from microscopical specimens, viewed in the
ordinary way. This should make the subject of another observation.

I visited this locality several times during August and October, 1881. I
found an abundance of the saline incrustation of which you have spoken,
and at the time of my first visit there was a little pond hole just east
of the point named that was in the act of drying up. Finally it dried
completely up, and then the saline and green incrustations both were
abundant enough. The only species, however, I found of the ague plants
was the Gemiasma verdans. On two occasions of a visit with my pupils I
demonstrated the presence of the plants in the nasal excretions from my
nostrils. I had been sneezing somewhat.

There is one circumstance I would like to mention here: that was, that
when, for convenience' sake, my visits were made late in the day, I
did not find the plants abundant, still could always get enough to
demonstrate their presence; but when my visits were timed so as to come
in the early morning, when the dew was on, there was no difficulty
whatever in finding multitudes of beautiful and well developed plants.

To my mind this is a conclusive corroboration of your own statements in
which you speak of the plants bursting, and being dissipated by the
heat of the summer sun, and the disseminated spores accumulating in
aggregations so as to form the white incrustation in connection with
saline bodies which you have so often pointed out.

I also have repeated your experiments in relation to the collection
of the mud, turf, sods, etc., and have known them to be carried
many hundred miles off and identified. I have also found the little