45 
tions will have to be made at quite arbitrary intervals 
until this developmental period is determined. Now 
that each inmate of the parrot house has been examined 
and passed any cases developing or dying there with 
worms will throw new light on the subject. 
III. To discover a therapeutic agent. 
I. Identification of infested birds. 
The external appearances have not been sufficiently 
characteristic to lead to exact diagnosis. Some birds, 
even though passing enormous numbers of ova are in 
good feather. Others show symptoms like any sick 
bird — feathers ruffled, head hung down, eyes closed. 
Several cases, however, have shown suggestive symptoms. 
They extend the neck as though attempting to vomit. 
A macaw is at present passing a frothy material from 
the mouth. Another bird which did iiot have pneumonia, 
emitted a wheezing sound. Some of the birds produce 
droppings in larger quantity than their mates, and where 
these contain mucus, as they often do, we have fore- 
told infestation. But these signs are so inconstant that 
laboratory diagnosis is necessary. The only avenues to 
diagnosis would seem to be the blood, urine, stomach 
contents and temperature. Some time has been spent 
investigating the blood, but so many technical difficul- 
ties arose and so much time was required that this means 
was abandoned. 
Experiments were also performed toward the pro- 
duction of emesis and the recovery of the worms in the 
vomitus. Preliminary experiments on pigeons were suc- 
cessful. One-tenth grain apomorphine hypodermically 
caused regurgitation of food. This was probably only 
from the crop, as no stones accompanied the grain. An 
amazon received one-fifth grain apomorphine hyper- 
dermically. Excited talking, laughter and some dizziness 
resulted, but no emesis. 
An attempt was then made to draw out the proventri- 
cular contents mechanically. This failed, as a small 
