III. TREATMENT IN THE COLD CHAMBER 
The dimensions of the cold chamber are twelve feet long by 
seven feet wide by six and three-quarter feet high, and this is 
cooled by a refrigerator. 
The lowest temperature reached in our experiments was 20° F. 
As the cooling apparatus was stopped during the night the 
temperature rose, and in the morning, before starting the machinery, 
reached 36° F. to 38° F., but this, of course, varied with the 
temperature of the atmosphere outside the chamber. 
The humidity of the atmosphere in the chamber was low, and 
was found to vary between 5 ° anc ^ 60 P er cen *-> but this also 
varied with the humidity outside, as the door had to be opened 
several times daily for the purposes of observation and to admit oi 
feeding the animals. 
For the above observations regarding humidity and temperature 
we are indebted to Major Williams, who compares the atmosphere 
of the cold chamber to that in the interior of Canada. 
We were thus enabled to carry out treatment in a cold, dry 
atmosphere, and from personal experience we can testify to the 
invigorating feeling bestowed on us by a short sojourn in this 
chamber. 
The animals in this chamber were active and took their food 
well, and, without doubt, seemed much better than their controls 
outside in the animal house. 
The patient W.A.. suffering from sleeping sickness contracted in 
Rhodesia, several times visited the cold chamber for treatment, 
but, unfortunately, at this time, no counts were made of the 
parasites in the peripheral circulation, but we have the e\i ence 
of the patient himself, who emphatically declared tiat le 
much better after being for some time in the cold cham er. 
As the patient became worse, treatment had to be discontinued 
owing to the fact that the patient was considered too ill to trave 
from the Royal Southern Hospital to the University, an 
to resort to treatment in animals alone. 
