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
depressions caused by the tread of cattle affording a fine nidus for the
plants. You have only to scrape the minutest point off with a needle or
tooth pick to find an abundance by examination. I have not been able to
explore many other sites, nor do I care, as I found all the materials I
sought in the vicinity of New York.
To this I must make one exception; I visited the Palisades last summer
and examined the localities about Tarrytown. This is an elevated
location, but I found no Gemiasmas. This is not equivalent to saying
there were none there. Indeed, I have only given you a mere outline of
my work in this direction, as I have made it a practice to examine the
soil wherever I went, but as most of my observations have been conducted
on non-malarious soils, and I did not find the plants, I have not
thought it worth while to record all my observations of a negative
character.
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