G. H. F. Nuttall 
443 
sparks projected upward from the braziers which rest on bricks in the 
centre of the floor. The braziers (seen in cross section in Fig. 7) are simply 
made from 5-gallon oil drums, one side being cut away for a width of 
8 inches; each end is held in place by 4 rivets, and 85 holes (|— 1 inch) 
are punched in the metal, 20 holes being made at each end and the rest 
at the sides. 
This hut, even when placed in an exposed position, was readily 
heated by the coke braziers, for whilst loaded with 60 blankets, the 
temperature inside attained 65° C. in 45 minutes. The 60 blankets are 
reckoned as equivalent to 200 pieces of underclothing, or 100 suits of 
Fig. 7. Improvised hot-air disinfestation hut (Grant and Peacock). Vertical section 
showing the manner of suspending the blankets and iron deflector. The braziers are seen 
in cross section. 
clothes, or 60 greatcoats. It was found best to hang the articles only in 
the upper part of the chamber as thereby the process of disinfestation was 
considerably shortened. In practice the hut dealt with fewer articles 
per diem if the heating was continued until the temperature near the 
floor of the chamber attained the degree requisite to kill vermin. 
From what Lieut. Peacock told me last year, there must be a con¬ 
siderable air circulation through the walls of this hut for the canvas walls 
bulged out above and in below. 
The time occupied in the various manipulations is reckoned as 
follows: loading (60 blankets or their equivalent) 15 minutes, heating 
Parasitology x 29 
