STRAIN AND OVER-ACTION OF THE HEART. 15 



Among the 12 with abnormtil signs are 3 more or less well- 

 marked instances of h3'pertrophy, 7 of the remaining 9 had 

 some cardiac symptoms in addition to the physical evidences 

 of disorder, and several of these showed typical irritable hearts. 

 One of the cases of hypertrophy might be set aside on the 

 ground of the very free use of tobacco ; and the same may per- 

 haps be said of two of the cases of functionally disturbed iieart, 

 leaving still 9 out of 24 in which the occupation of glass- 

 blower — chiefly, I think, on account of the respiratory eiforts 

 — has led to cardiac affection. 



