them M. C. Cook, of London, England. Nothing came of these efforts.

2. In August, 1873, Dr. B. visited Riverside, near Chicago, to hunt up
the ague plants. Found none, and also that the ague had existed there
from 1871.

3. Lamonot, a town on the Illinois and Michigan Canal, was next visited.
A noted ague district. No plants were found, and only two cases of
ague, one of foreign origin. Dr. B. here speaks of these plants of Dr.
Safford's as causing ague and being different from the Gemiasmas. But he
gives no evidence that Safford's plants have been detected in the human
habitat. In justice to myself I would like to see this evidence before
giving him the place of precedence.

4. Dr. B., Sept. 1, 1873, requested Dr. Safford to search for his plants
at East Keokuk. Very few plants and no ague were found where they both
were rife in 1871.

5. Later, Sept. 15, 1873, ague was extremely prevalent at East Keokuk,
Iowa, where two weeks before no plants were found; they existed more
numerously than in 1871.

6. Dr. B. traced five cases of ague, in connection with Dr. Safford's
plants found in a cesspool of water in a cellar 100 feet distant. It is
described as a plant to be studied with a power of 200 diameters, and
consisting of a body and root. The root is a globe with a central cavity
lined with a white layer, and outside of these a layer of green cells.
Diameter of largest plant, one-quarter inch. Cavity of plant filled with
molecular liquid. Root is above six inches in length, Dr. B. found the
white incrustation; he secured the spores by exposing slides at night