Gr. H. F. Nuttall 
453 
The air enters the lower part of the chamber which expands like a 
funnel and passes out again above where the chamber again contracts, 
thence the air passes back to the hot-air shaft (h) which contains 
a coal-heated furnace and thence returns re-heated to the blower. A 
Fig. 13. Vondran hot-air disinfector. Large apparatus for disinfestation 
of clothing and effects. From Miessner and Lange (1917). 
regulating or deviating shaft (r) connects the outflow and inflow shafts 
above and below, when the dampers are regulated as in if, thereby 
cutting off the shaft which supplies the hot air and regulating the 
temperature in the different parts of the apparatus. In C the dampers 
