a contagious fever in a work-house, soon
after this experiment was made.

_CASE XIX._

WILLIAM SUMMERS, a child of five years and a half old was inoculated
the same day with Baker, with matter taken from the nipples of one of
the infected cows, at the farm alluded to in page 35. He became
indisposed on the 6th day, vomited once, and felt the usual slight
symptoms till the 8th day, when he appeared perfectly well. The
progress of the pustule, formed by the infection of the virus was
similar to that noticed in Case XVII., with this exception, its being
free from the livid tint observed in that instance.

_CASE XX._

From William Summers the disease was transfered to William Pead a boy
of eight years old, who was inoculated March 28th. On the 6th day he
complained of pain in the axilla, and on the 7th was affected with
the common symptoms of a patient sickening with the Small-pox from
inoculation, which did not terminate 'till the 3d day after the
seizure. So perfect was the similarity to the variolous fever that I
was induced to examine the skin, conceiving there might have been
some eruptions, but none appeared. The efflorescent blush around the
part punctured in the boy's arm was so truly characteristic of that
which appears on variolous inoculation, that I have given a
representation of it. The drawing was made when the pustule was
beginning to die away, and the areola retiring from the centre. (See
Plate, No. 3.)

[Illustration]

_CASE XXI._

April 5th. Several children and adults were inoculated from the arm
of William Pead. The greater part of them sickened on the 6th day,
and were well on the 7th, but in three of the number a secondary
indisposition arose in consequence of an extensive erysipelatous
inflammation which appeared on the inoculated arms. It seemed to
arise from the state of the pustule, which spread out, accompanied
with some degree of pain, to about half the diameter of a six-pence.
One of these patients was an infant of half a year old. By the
application of mercurial ointment to the inflamed parts (a treatment
recommended under similar circumstances in the inoculated Small-pox)
the complaint subsided without giving much trouble.

HANNAH EXCELL an healthy girl of seven years old, and one of the
patients above mentioned, received the infection from the insertion
of the virus under the cuticle of the arm in three distinct points.
The pustules which arose in consequen