:Jö2 



Miscellanea 



their ceplialic and bizygoniatic lireadths. Using again 8 mm. for dittirencc of liviiig liead and 

 skull hreadths wo liavo tlie foUowing Table : 



TABLK 11. 



Frnin those re.sults wo dcducc : 

 Bizygomatic Breadth : 



Mcan Error of 5 Oraon 

 „ „ 5 Naqada 



Cephalic Breadth: 



Mcan Error of 5 Oraon 

 „ „ 5 Naqada 



It is clear that 



(i) The forraulae give liy no mean.s very close resnlts wlion wo prcdict thc bizygomatic 

 and cephalic breadth.s of an individual from the formula for his own race, and (ii) raay give 

 very divergent results if we prcdict au individual from the formula for a second race. In 

 other words ; ..1 hiotdedge of the moat probable values of the bizygoviatic or cephalic brcadtha 

 reconstructed from the frontal breadth in the ca»e of one race, is not a knowledge of the most probable 

 values in a second luudlied race. 



The coefficients of correlation and tlie Standard deviations of tbcsc breadths vary widely 

 from race to race, and accordingl}- thc simple or nndtiple regression fornuilae will also vary. 



For examplc, the foUowing values are given for the Ncanderthal skull by Professor v. Török* : 



F= 107 mm., C= 147 mm. 



Thc cephalic maximnm breadth predictcd from the minimiini frontal brc;idth would lic 144 

 from the English formula, 143 from the interracial Bcngal fonnula, 142 if i>rediit«l from thc 

 Oraon tril«, 111 from thc Theben furiimla, and 140 if predictcd from thc N.iqada crania. 



* loc. cit. p. 584. 



