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Scientific American Supplement, No. 385, May 19, 1883 by Various
page 87 of 130 (66%)
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.

I now come to an important part of the corroborative observations, to
wit, the blood.

I have found it as you predicted a matter of considerable difficulty to
find the mature forms of the Gemiasmas in the blood, but the spore forms
of the vegetation I have no difficulty in finding. The spores have
appeared to me to be larger than the spores of other vegetations that
grow in the blood. They are not capable of complete identification
unless they are cultivated to the full form. They are the so-called
bacteria of the writers of the day. They can be compared with the spores
of the vegetation found outside of the body in the swamps and bogs.

You said that the plants are only found as a general rule in the blood
of old cases, or in the acute, well marked cases. The plants are so few,
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