172
HORSE No. XCI.
POSITIVE RESULT.
Australian Gelding, aged, in very fine condition, was cast on account of lameness.
The question as to how rats could cause the disease in horses was raised ; for the food would rarely, if ever, be
soiled with the blood of these animals. It therefore only remained to be tried whether the excreta of rats, in whose
blood the infusorian was present at the time of its collection, could cause the disease when mixed with grain. An
experiment with this end in view had already been undertaken at Poona, on the Deccan plateau, where the disease is
not enzootic, and where the difficulty of producing it was fully recognised, owing to the dryness of the situation at
that period of the year (December to February). These experiments as expected proved negative.
Consequently it was deemed advisable to make further experiments with the same end in view in Bombay, where
the climate is favourable from its humidity, and the disease is enzootic.
Two horses (Nos. LXXXIX and XCI) were therefore transported on May 6th, 1893, to Bombay and through the
courtesy of Major J. Mills were located at the Veterinary College Hospital. A regular supply of rats was main-
tained, principally from the Bandora Kennels, and their blood was examined daily. The rats, in the blood of which the
hæmatozoon was discovered, were placed in wire cages over a metal plate, so that the excrement would fall through
into the receptacle and be forthcoming when required. Morning and evening the excrement was collected, weighed,
and a known quantity mixed with the ration of corn previous to its being given to the animals under experiment.
The results of the experiment in the case of Horse No. LXXXIX proved negative.
Month and Date.
May
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
June
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
1893.
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Temperature °C.
A.M.
38.1
38.0
37.6
37.6
37.8
37.7
38.1
38.0
38.1
37.8
37.8
38.1
37.8
38.1
37.8
37.8
37.8
38.0
38.0
38.0
37.7
37.7
38.1
38.1
38.1
38.0
38.1
38.0
38.1
38.1
37.8
38.1
38.0
38.0
38.1
38.1
37.8
38.0
38.0
38.0
37.7
37.7
37.7
37.8
37.7
37.8
37.8
37.8
38.0
37.9
P.M.
37.8
37.5
37.7
37.6
37.6
37.6
37.6
37.8
37.7
37.7
37.8
37.8
37.8
37.7
37.8
38.0
37.8
38.0
37.4
37.6
38.0
38.3
38.3
38.0
37.9
37.8
38.1
38.1
38.0
37.8
37.6
38.1
38.0
38.0
37.8
37.8
37.7
37.8
37.9
37.8
37.8
37.9
37.7
37.7
37.8
37.8
37.8
37.8
37.9
37.8
Pulse.
A.M.
37
36
36
38
40
40
36
36
36
36
34
36
38
42
36
36
36
36
40
36
32
36
40
33
36
40
40
40
42
44
46
40
36
50
44
40
40
36
40
36
36
32
36
36
40
36
40
44
46
36
P.M.
38
40
40
36
40
36
40
40
36
36
40
38
36
40
36
44
43
38
42
36
36
36
40
37
36
44
48
40
44
42
43
40
44
44
40
40
42
43
42
40
44
44
40
40
40
40
44
44
44
40
Respiration.
A.M.
20
17
18
20
18
18
19
20
16
19
20
18
19
17
20
18
20
20
20
18
18
18
18
21
22
19
18
20
20
19
19
20
18
18
18
21
20
20
21
20
18
18
19
20
19
20
20
20
23
20
P.M.
19
20
19
20
16
20
18
20
19
19
20
18
18
19
20
20
20
21
20
18
20
20
20
21
23
18
20
19
20
20
20
20
20
18
20
20
21
20
20
20
20
20
19
19
20
19
20
20
20
20
Temperature in
Shade °F.
Maximum.
88.9
89.9
90.4
90.4
89.9
90.4
90.4
89.4
89.4
89.4
88.9
89.9
88.4
89.9
89.4
89.4
89.9
89.9
90.9
90.9
90.9
91.4
85.9
82.4
82.9
87.9
87.9
88.4
88.9
88.9
89.4
90.4
90.4
88.4
90.9
86.4
87.9
85.4
84.9
86.4
83.4
81.4
79.8
81.9
81.4
80.9
80.9
80.9
84.4
83.9
Minimum.
80.0
80.0
81.0
80.5
80.5
81.0
80.0
81.0
79.0
80.0
80.0
80.0
79.5
80.0
80.0
81.0
81.0
81.5
81.5
81.5
82.0
79.5
75.5
78.0
80.5
80.5
80.0
79.0
80.0
80.5
81.5
80.5
78.5
82.0
76.0
76.0
80.0
77.0
77.0
76.5
76.0
76.5
78.0
76.0
75.0
76.5
76.5
76.5
78.5
78.5
Humidity.
72
74
74
74
72
75
70
74
75
73
75
77
69
72
69
74
72
77
70
79
76
87
93
89
81
75
79
79
77
75
79
79
83
80
89
87
83
85
87
91
91
93
89
83
95
89
91
89
85
85
Condition
of Blood.
Healthy.
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
REMARKS.