2?>6 Beri'ji <iii<l llHrJuu'r: 



III the case of the four Melbourne students tlu' true mean is- 

 IJ^G!) cc, with a ian<;e of variation from 12r)f) to l.jOO. or in 

 numbers lebitive to the true mean (lOO), from 85.7 to 108.2. 



The 215 Middlesex and Kinfr's College students are given by 

 Gladstone in thi-ee groups according as to wheth'r they Avere 

 medallists and prizemen, students of average intelligence or only 

 students below average inteTligence. The indivi<lual figures are- 

 not available, so we can onlv deal with Gladstone's material as a 

 whole. We find the true mean, as estimated from his table of 

 average measui-ement for his tlii-ee classes, to be 1507.04. with a 

 range of variation from 1451.18 in Class C, the students below 

 average intelligence, to 1565.09 in the medallists of Class A. The 

 lange of relative variation is. therefore, from 00.2 to IO0.8. TIk- 

 much more restricted range of variation in tlie Middlesex Hospital 

 and King's College group is due to tlie fact that it is based upon 

 averages of groups and not upon individuals, as in the cases of all 

 our other gi'oups where we liave recorded the range of variation,, 

 and consequently Ave do not specially emphasise the figures. 



We do not intend to institute any t'omparisons in the present 

 Avork between tlie cnl)ie capacity of males and females, but it Avill 

 be of interest to study this I'elative lange of A'ariation in the case- 

 of the 30 Avomen students of Bedford College, the original figures- 

 for Avhich are again taken from Lee and Pearson. The true mean 

 of the cubic capacity of brain is in these students loOO. Avith a 

 lange of variation fi-om 1200 to i(i47. or in numbers i-elative to the 

 true mean (100). from 86.:} to 118.4. 



If the several groups be now arranged in the order determined by 

 the estimated amount of cubic capacity of brain Avith the minimum 

 and maximum ranges of variation of each group stated in terms 

 of the true mean (iOO) of tliat partieular grou]>, wc olitain the- 

 folloAving :- — 



.Miiiiiiiiiiii. Tine ik-aii .\l.i\iumin. 



1. .'?.-> Anatniiiists - - S<».2 - ]r>'A7 cc. - 117.«» 



•^. 25 University <-%>ll«'o-t' - SO - lollcc. - lo^ 



:{. 215 London INIodical Stiulents !lt!.2 - 1507 cc. - 103.H 



1. Britisli Association males - — - 141)5 cv. - — 



5. !■ Mellnaune Students - H5.7 - Uf.i) cc. - 1()H.2 



(J. 855 Mell>ourne Criminals - so.'.i - 1 1:{S ce. - 123 



If the amount of cubic ca])acity of brain of the foregoing gi-ou])s 

 be worked out in ri'lative numbers from the lowest class, tiic- 

 criminal, Avliose cubic capacity of brain sliall be regarded as llKt, 

 Ave achicA'e the following results : — 



1. 3oo criminals .-,... iQO. 



2. 4 Mcllmurne Students ----- 102.1 

 S. British Association nialas ... - IQ.'i.O 



4. 2ir) London Medical Stud<<nts - - - 104.7 



5. 25 University College Teachers - - - 105.0 



6. 35 Anatomiists .--... 10O.8 



