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injection of cattle serum than horse serum is reserved for further 
study. 
The fact that guinea pigs may be rendered susceptible by the feed- 
ing of strange proteid matter opens an interesting question as to 
whether sensitized guinea pigs may also be poisoned by feeding with 
the same serum. If man can be sensitized in a similar way by the 
eating of certain proteid substances it may throw light upon those 
interesting and obscure cases in which the eating of fish and other 
sea food, etc., by certain individuals habitually causes sudden and 
sometimes serious symptoms. 
/ 
