826 Proceedings of Royal Society of Edinburgh. [sess. 
occurred in Westphalia, and it is this which took place in the 
Dolcoath mine in Cornwall. We have no proof, therefore, that the 
disease may not at the present time he making its way into British 
mines other than those of Cornwall. Personal cleanliness on the 
part of the miners, cessation of the irregular disposal of their 
dejecta when working underground, microscopical examination of 
the blood of suspected miners for excess of eosinophile white 
corpuscles, also, if need he, of their faeces for ova, medical ex- 
amination of miners returned from South America, India and the 
Colonies for evidences of anaemia, keeping the temperature of the 
mines low and their humidity to a minimum, are prophylactic 
measures which should be at once resorted to if perchance the 
disease should invade our coalfields. 
Fig. 1 .- — AnTcylostoma duodenal e (human), natural size. The smaller 
worm is the male. 
(. Issued separately July 10, 1905.) 
