444 
Combating Lousiness 
up and killing the lice 75 minutes, unloading 5 minutes, total 95 minutes. 
Reckon 15 minutes in addition for the first heating in the morning. 
Vermin in the heated chamber are exposed for a period of 30 minutes 
at 65° C. 
A staff of 3 men is required to attend to the working of the hut; but 
the delivery, receiving, folding, checking, etc. of the articles handled 
require additional help. 
See Hon . A. A. 
Figs. 8-10. Hot-air disinfestation hut (Orr, Model B, modified in details bj Grant). 
Fig. 8. Section. Explanation in the text and figure. 
Precautions should be taken against the inhalation of coke fumes. 
Hot-air disinfestation hut (Figs. 8-10, Orr’s Model B, modified by 
Grant) 1 . This hut is constructed on the same principle as the fore¬ 
going but is more rigid and provided with doors. The double walls 
are of uralite, or of uralite inside and corrugated iron outside, in 
place of canvas. The hut shows various improvements as follows: 
1 Condensed from description by Captain Grant (MS. Report, W.O. i. 1918) 
