G(30D WORK IN HRITISII GUIANA 1U3 



Yes! British Guiana can compete on equal terms 

 with Cuba for the honour of haxing paved tlie way 

 to the epoch-making discovery, and all honctur to the 

 great clinician and the young professor and his clerical 

 companion who, with the simplest instruments, got so 

 near the truth. I^. H. R. Carter, of the JNIarine 

 Hospital Service, had also drawn attention to the 

 curious " extrinsic " period of incubation of yellow 

 fever, that is to say, to the remarkable fact that an 

 interval existed between infected and secondary cases — 

 the interval being, as we now know, the latent period 

 which the virus passes in the stegomyia. It is clear 

 that Harrison and Carter were both thinking alike. 



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