1912.] The Size of the Aorta in Warm- Blooded Animals. 45 



Table IV. — Eats (grouped). 



Group. 



Numbers of individuals 

 from Table III in 

 group. 



Average body weight. 



Average radius of aorta. 



Average area of aortic 

 cross-section. 



O 



II 



Aortic cross-section as 

 percentage of body 

 weight. 



Cross-section calculated. 

 (k = 21 -9.) 



g i . 

 a -= 



o 



x - 



t E 



X w ~ 



5 b. ^ 

 S oS 

 gj-5 g g 



5 



Cross-section calculated 

 as percentage (1 - 28) 

 of body weight. 



Difference between 

 cross-section calcu- 

 lated and observed. 







grm. 



mm. 



sq. mm. 











per cent. 





per cent. 



A 



1-3 



36 "5 



0-441 



-61 



21 



•9 



1-67 



0-609 



0-16 



0-467 



30 -62 



B 



4-7 



53 -5 



-503 



0-793 



22 



•1 



1 -48 



0-802 



1-12 



0-685 



15 -77 



C 



8-12 



81 -2 



-583 



1 -07 



22 



•2 



1 -32 



1 -08 



0-93 



1 -04 



2-88 



D 



13-18 



129 -0 



0-691 



1 "5 



22 



•1 



1 -16 



1-51 



0-66 



1-65 



9 -09 



E 



19-25 



166 -4 



0-763 



1 -83 



21 



•7 



1 -1 



1 -82 



0-55 



2 -13 



14 -08 



F 



26-27 



296 -0 



0-952 



2-85 



21 



1 



0-96 



2-75 



3-64 



3-79 



24 -8 





21 



■9 



1-28 





1 -18 





16 -22 



Table V. — Babbits (individuals). 



6 



X 

 CD 



m 



Body weight. 



Badius of aorta. 



Area of aortic cross- 

 section. 



% 

 ii 



Aortic cross-section as 

 percentage of body 

 weight. 



T3 

 CD 

 -»3 



jr 



§1 * 

 s£S 



1 11 I 



o 

 O 



Difference between 

 cross-section calcu- 

 lated and observed. 



Cross-section calculat ed 

 as percentage (0 -(109) 

 of body weight. 



Difference between 

 cross-section calcu- 

 lated and observed. 







grm. 



mm. 



sq. mm. 









per cent. 





per cent. 



1 



? 



310 



0-996 



3 -12 



18-82 



1 006 



2-61 



19 -54 



1 -89 



65 -08 



2 



? 



370 



926 



2-7 



24 -66 



73 



2-96 



8-78 



2 25 



20 



3 



9 



530 



1 -14 



4-1 



20-96 



0-774 



3 82 



7 33 



3 23 



26 93 



*4 





767 



1 -43 



6 -44 



17 35 



0-84 



4 97 



33 6 



4-67 



37 -9 



5 



3 



1330 



1 -41 



6-25 



26 43 



-47 



7 35 



14 96 



8 1 



22 -84 



6 



3 



1420 



1-47 



6 77 



25 56 



0-477 



7-7 



12 -08 



8-65 



21 -73 



*7 





1640 



1 85 



10 -23 



18 -74 



-624 



8 52 



20 07 



9 99 



2-4 



8 



3 



1885 



1 -59 



7-97 



26 55 



423 



9-41 



15 -3 



11 -48 



30 -57 



9 



3 



2080 



1 84 



10-64 



21 -32 



0-512 



10-09 



5 45 



12 67 



16 02 



*10 





2096 



2-07 



13 45 



16 -96 



642 



10 15 



32 51 



12 76 



5 -41 



11 



3 



2100 



1-71 



9 15 



24 -97 



0-436 



10 16 



9 94 



12 -79 



28-46 



12 



3 



2550 



1 -74 



9 52 



27 -54 



0-373 



11 -66 



18 35 



15 -53 



38 -7 









Averac 



;e 



22 -49 



0-609 





16 49 





26 34 



* The data for the individuals indicated are taken from Keilson (6). 



Table V gives the figures for the aortas of 12 rabbits, ranging in weight 

 from 310 grm. to 2250 grm. {i.e. increasing more than eightfold). The average 

 aortic constant Qe) is 22-49, with an n (best n) of O'Tl, and the average 



