2 -20 



Transactions. 



of the age-distribution of those not born in New Zealand. The graphs 

 representing the rates of lunacy for the two sexes are also repeated in fig. 2, 

 and two other graphs are given representing how our population above 

 twenty years of age and not New-Zealand-born would be distributed in age 

 and sex if such distribution were the same as that of the population of 

 England and Wales as given in the census of 1901 ; or, in other words, 

 representing the age and sex distribution of a portion of the population of 

 England and Wales over twenty equal in number to that of our population 

 over twenty not New-Zealand-born. A comparison of these graphs with 



Fig. 2. 

 Population not N,Z. born 



The same over twenty years of age dis- 

 tributed in age and sex as in census 

 of England and Wales. 1901 



I Males i 

 t Females - 



Number of lunatics per 10. o'"© of population _ 



'Males _ — — . 



Males _._. 



■ , y"] 



T^ 



20 



lu 



20 



10 



0-5 5-10 10-15 15-20 20-25 25-30 30-35 35-40 40-45 45-50 50-55 55-60 60-65 65-70 70-75 75-30 80 and over. 

 - Age periods. 



the others in the same figure again reveals clearly the exceptional character 

 of the age and sex distribution in question. It is obvious, then, that, in 

 view of the very different rates of insanity prevalent in the various age- 

 periods, the figures as presented by Dr. Hay cannot be accepted as any 

 indication of the comparative insanity of the immigrant and his country- 

 men at home. 



In Table II I have made an endeavour to roughly measure the correction 

 that must be applied to allow for the features I have pointed out. The first 

 column gives the age-periods beginning at 20-25, the next two give the 

 population of New Zealand according to age-period and sex, and the 

 next two again our immigrant population classified in the same way. The 

 sixth and seventh columns give our total immigrant population above the 

 age of twenty redistributed in respect to both age and sex proportionally 

 to the population of England and Wales according to the census of 1901. 

 The next two columns again give the New Zealand rates of lunacy, which 

 have been already shown to apply generally to the New-Zealand-born and 

 the immigrants as a whole. The last two columns give the number of 

 immigrant lunatics there would be if our immigrant population of twenty 

 years and over were distributed in age and sex as the population of England 

 and Wales is distributed. 



