In September I revisited the city, taking with me a medical gentleman
who, residing in the South, had had a larger experience with the disease
than I. From the macroscopical examination he pronounced a case we
examined to be ague, but I was not able to detect the plants either in
the urine or blood. This might have been that I did not examine long
enough. But a little later I revisited the city and explored the soil
about the Whitney Water Works, whence the city gets its supply of
water, and I had no difficulty in finding a good many of the plants
you describe as found by you in ague cases. At a still later period my
patient, whom I had set to use the microscope and instructed how to
collect the ague plants, set to work himself. One day his mother brought
in a film from off an ash pile that lay in the shade, and this her son
found was made up of an abundance of the ague plants. By simply winding
a wet bandage around the slide, Mr. A. was enabled to keep the plants
in good condition until the time of my next visit, when I examined and
pronounced them to be genuine plants.

I should here remark that I had in examining the sputa of this patient
sent to me, found some of the ague plants. He said that he had been
riding near the Whitney Pond, and perceived a different odor, and
thought he must have inhaled the miasm. I told him he was correct in his
supposition, as no one could mistake the plants; indeed, Prof. Nunn, of
Savannah, Ga., my pupil recognized it at once.

This relation, though short, is to me of great importance. So long as I
could not detect the gemiasmas in New Haven, I was very skeptical as to
the presence of malaria in New Haven, as I thought there must be some
mistake, it being a very good cloak to hide under (malaria). There is no
doubt but that the name has covered lesions not belonging to it. But now
the positive demonstrations above so briefly related show to my mind