1912.] The Size of the Aorta in Warm- Blooded Animals. 41 



and consequently includes the weight of the contents of the alimentary 

 canal, i.e. it is " Eohgewicht," The aortic radius is calculated in millimetres 

 and the sectional area in square millimetres from the observed m. 



Table I. — Guinea Pigs (individuals). 



o 



• * 



Sex. 



Hotly weight. 



■g 

 | 



°o 

 m 

 • — 



Area oi' aortic cross- 

 seetion. 



;< 

 n 



% 



ii 



1 



1 o 



1 i° 



o | ~t 



|£ 



c " - 



§ 



Si j 

 1 II ■ 



CO 



m 

 Fh 



K > 



g s 



S o 

 "3 



j2 i 



s 



C> 



o x 



— t- 



~= ° 



-i M "3 



J 1 * 



— ^ - 



71 



§ 5 . j 

 P d £ 



- - £ 



s — 



o o 



8 5 



- ¥ 



£ ~ 



u 5 a) 







grin. 



mm. 











per cent. 





per cent. 



1 



o 



130 



-643 



X 6 



24-4 



1 -o 



1-27 



2-36 



1 -01 



28 -7 



2 



Q 



¥ 



140 



0-679 



1 - 44 



23 -2 



1 -03 



1 -34 



7 -46 



1-09 



32 -1 



3 



o 

 ¥ 





-586 



1 '08 



35 -5 



-64 



1 -54 



29 -87 



1 -33 



18 -8 



4 



o 

 ¥ 





0-599 



1 "12 



34 -2 



0-66 



1 -54 



27 -27 



1 -33 



15 -8 



5 



Q 



¥ 



170 



0-860 



2 '32 



16 -5 



1 -36 



1 -54 



50-65 



1 -33 



74 -5 



6 



¥ 



200 



0-774 



1 - 8S 



22 -9 



-94 



1-73 



8-67 



1 -56 



20-5 



7 



s 



205 



0-829 



2-15 



20 -4 



1 -05 



1 -76 



22 -16 



1-6 



34 -4 



8 



Q 



210 



0-796 



1 -99 



22 -4 



0-95 



1 -79 



11 -17 



1 -64 



21 -4 



9 



3 



220 



-745 



1 -74 



26 -5 



-79 



1 -85 



5 -95 



1 -72 



1 16 



10 



? 



220 



-752 



1 -77 



26 -0 



0-8 



1 -85 



4-32 



1 -72 



2-91 



11 



3 



230 



0-749 



1 -76 



27 -0 



0-77 



1-91 



7 -85 



1 -79 



1 -68 



12 



9 



230 



0-739 



1 -71 



27-8 



0-74 



1 -91 



10 -47 



1 -79 



4-47 



13 



3 



232 



0-952 



2-84 



16 -8 



1-22 



192 



47 -92 



1-81 



56 -9 



14 



3 



300 



0-78 



1 -91 



30 -0 



0-64 



2-3 



16 -96 



2 -34 



18-4 



15 



3 



300 



-854 



2 -28 



25 -2 



-76 



2-3 



0-87 



2 -34 



2-56 



16 



3 



305 



1 -03 



3 34 



17 -4 



1 -09 



2-33 



43 "34 



2-38 



40-3 



17 



3 



320 



0-939 



2 -77 



21 -7 



0-S7 



2-41 



14 -94 



2-5 



10 -8 



18 



3 



330 



0-745 



1 -74 



35 -3 



0-53 



2-47 



29 -55 



2-57 



6 62 



19 



? 



370 



1 -oi 



3-22 



20 -7 



0-87 



2-67 



20 -6 



2 -89 



11 4 



20 



? 



370 



-933 



2 -73 



24 -4 



0-74 



2-67 



2-25 



2 -89 



5 "54 



21 



3 



400 



0-971 



2 -96 



23 -8 



0-74 



2 -83 



4-59 



3-12 



5-16 



22 



3 



420 



-905 



2-57 



28 -4 



-61 



2-93 



12 -29 



3-28 



21 -6 



23 



3 



430 



1 -03 



3 -32 



22 "3 



0/7 



2 "98 



11 "41 



o *ox 

 o oo 



U oy 



24 



3 



490 



1 -02 



3 -24 



25 -1 



0-66 



3-26 



0-61 



3-82 



15 2 



25 



¥ 



500 



0-955 



2-87 



28 -7 



-57 



3-31 



13 -29 



3-9 



25 4 



26 



¥ 



550 



-939 



2-77 



31 -9 



0-5 



3-54 



21 -75 



4-29 



35 -4 



27 



? 



555 



1 -15 



4 -15 



21 -4 



0-75 



3-57 



16 -25 



4 33 



4-16 



28 



3 



600 



1-29 



5 -22 



18 -0 



0-87 



3-77 



38-46 



463 



11 -5 



29 



? 



620 



1 -13 



4 -03 



23 -8 



0-65 



3 -86 



4-4 



4-84 



16 -7 



j 30 



3 



640 



1 -3 



5 -33 



18 -4 



0-83 



3-95 



34 94 



4-99 



6-81 



31 



? 



640 



1-03 



3-36 



29 -3 



-53 



3 -95 



14 -94 



4 -99 



32 -6 



32 



? 



738 



1 -12 



3-92 



27 - 7 



0-53 



4-37 



10 -30 



5 -76 



22 -9 



33 



6* 



790 



1 -29 



5 -22 



21 -9 



0-66 



4-58 



13-97 



6-16 



15 -6 



34 



? 



830 



1 -21 



4-57 



25 -9 



"55 



4 -75 



3-79 



6 -47 



29 -4 



1 35 



<? 



950 



1-23 



4-71 



27-6 



0-5 



5 -22 



9-77 



7-41 



36 "6 



Average 



24 -9 



0-78 





16 -44 





19 -63 



A. Mammals. — In Table I are given the figures and calculations for 

 35 guinea-pigs ranging in weight from 130 to 950 grin. (i.e. increasing more 

 than sevenfold). From this table it is at once evident that, as would be 



