478 Journal of Comparative Neurology and Psychology. 



Equations 2' 



(1) Swedish ^ W = 14S7.7S3 — 1-939 A 102.972 



(2) " $ W = 1501.411 — 2.372 a 107.582 



(3) " 9 W = 1326.475 — 1.549 A 97-969 



(4) " 9 W = 1340-438 — i-9^S a 104.329 



(5) Hessian $ \<! = 1439.734 — 1.119 A 111.087 



(6) " $ W = 1432.497 — .847 (Z II 1. 014 



(7) " 9 W= 1361.067 - 2.259 A 95-512 

 (S) " 9 W = 133^^9^ — 1-735 " 100.445 

 (9) Swedish ^ W = 9i5-054 + 2.859 S 104.533 



(10) " ^ W = 919.374 + 2.914 s 107.405 



(11) " 9 W = 4:! I -994 + 5-234 S 94.421 



(12) " 9 W = 451.643 4- 5. 121 s 99-294 



(13) Hessian ^ W= 913.592 -|- 2.857 S 110.787 



(14) " J' W =; 950.214 -\- 2.723 s 109.628 



(15) " 9 W = 83^.624+2.7148 ioo.6|3 



(16) " 9 W = 894. o3[ -(- 2.460 J- 100. 161 



(17) Bavarian J* W = 836.667 -f- 3-^27 S 118.452 



(18) " 9 W= 6:7.157 + 3.8248 .03.562 



(19) Swedish $ ^N = 1091.021 + 2.2SS 8 — 1.755 A 101.819 



(20) " ^ W = 10:53.715 + 2.332 J- — I 856 a 106.477 



(21) " 9 W = 561-433 + 4-679 S — r.078 A 93-066 



(22) " 9 W = 533.407 + 4 8u -f— 1-092 « 98-923 

 {1^) Hessian J' W ^ 94.2 154 + 2.989 S — 1.181 A 108 992 



(24) " $ ^ = 926.586 + 3.107 J- — 1.318 a 108. 8S9 



(25) " 9 W = 1005.607 + 2.244 -^ — -2-173 A 94.261 



(26) " 9 W= 974.382 + 2.345 .f— 1.829 rt 98.883 



(27) Bavarian J- W = 1263.308 + 1.S86 W 



(28) " 9 W= 1121.621 + 2.265 W 



-439 



K 103.495 



(29) " ^ W- 917-748 + 2..3+S+..355 W^ 



117. 71 1 

 102.432 



(30) " 9 W= 741.078 + 2.646 8 +1.593 w^ 



(3I)Bohemian^ W = 8.589L — 52.650 96548 



(32) " $ \^ = 8.076B + 253.596 102.170 



(33) >. J w = 6.215L + 264.265 88.466 



(34) " 9 W = 8.646B + 68.434 81.908 



(35) " ^W= 6.751L + 5.082 B —489.649 99 745 



(36) " 9 W = 4.696L + 7.766 B — 602.994 77.893 



A study of these equations shows at once the precise rela- 

 tion of each of the other characters, both singly and combined, 

 to brain-weight. The equations afford a means of scientifically 

 comparing the mean brain-weight of different races, since by 

 their use we can, in effect, reduce the races to be compared to 

 the same base with reference to other characters. This use of 

 the equations is illustrated for a specific instance in Table I, 



