BOWMAN LECTURE. 



XCVII 



A similar caution is necessary as to the families in 

 which only a single example of the disease can be 



ff 



Rctimtii P^mtntuitv 

 ? Ud i^St 

 Jiea<nis fvorn CGT!^ l<t 



discovered (Figs. 38 and 39); in some of these the disease 

 may have existed latent in several members, but become 



