[870.] four Orifices of the Heart. 285 



2. Phthisis (Dr. Peacock). 



Tricuspid 43 lines. 147 square lines. 



Pulmonic 29 67 



Mitral 37 109 



Aortic 26 54 



T 147 ... 

 M = Td9 =13< ' 



? = 67 =1 . 25 

 A 54 



Difference of the ratios = -10 

 In these two cases the orifices evidently closely exhibit the usual nor- 

 mal relation to each other ; and as the blood in phthisis emaciates and di- 

 minishes in quantity like the other parts of the body, we should not ex- 

 pect in a pure case of phthisis an amount of pulmonary obstruction suffi- 

 cient to produce marked alterations in the areas of the openings. 



3. Bronchitis (Dr. Peacock). 



Tricuspid GO lines. 286 square lines. 



Pulmonic 45 193 07 



Mitral 54 232-1 



Aortic 26 103*18 



T = 286^ =1 . 235 

 M 232-1 



P ^ 193^7 0 

 A 103-18 ___ 

 Difference of the ratios = *635 

 The relation is clearly abnormal. 



T and M are nearly in normal relation to each other, but P is abnor- 

 mally large in relation to A. This heart was enlarged (weighed 14 ounces) 

 from hypertrophy and dilatation of its right side, and the pulmonic orifice, 

 from the abnormal increase of the pressure of the current of blood sent 

 through it by the thickened right ventricle, became considerably dilated. 



4. Bronchitis (Dr. Davies). 



Tricuspid 5 in. 2 sq. in. 



Pulmonic 3*5 -975 



Mitral 38 1*15 



Aortic 3-1 -79 



T 2 



M = ri5- =W4 



P = j975 =1 . 24 

 A -79 ~ 

 Difference of the ratios = '50 



