15 
The observations on the lengths of the fingers were made after the 
measurements of the left hand had been taken. It was only necessary, 
after reversing the hand, to inspect the dorsum in order to note whether 
the tip of the ring finger or of the index projected farther along the nail of 
the middle finger, and, as the ring was generally very much longer than 
the index, the observation could generally be made at a glance. 
Dental Caries, If any teeth were found to be decayed or missing, their 
appropriate spaces were scored across on the blank forms that had been 
prepared and had been taken into the field with this object in view. 
Though incipient trouble may easily have escaped my notice, it is not 
likely that any appreciable sized cavity or that any missing tooth is un- 
recorded. 
In a proportion, but it was a very small proportion, of the older men 
the teeth were well worn and ground down into the secondary dentine; 
some appeared to have pyorrhoea; but neither of these conditions was 
confused with caries, neither, I believe, were any cases of unerupted third 
molars, which were met with in a number of adults, mistaken for extracted 
third molars, nor for an early loss of first molar teeth. 
From appendix X on page 71, one can see the details of the actual 
distribution of the decayed teeth ; and the reader is referred to this. From 
this appendix it is calculated that: 
(1) 78 per cent of the 82 men and old men examined at Island lake 
had sound teeth. The 18 persons who made up the remaining 
22 per cent had among them 47 carious teeth. 
(2) 75 per cent of the 115 women and old women examined at Island 
lake had sound teeth. The 29 persons who made up the remain- 
ing 25 per cent had among them 42 carious teeth. 
(3) 42 per cent of the 24 men and old men examined at Gods lake 
had sound teeth. The 14 persons who made up the remaining 
58 per cent had among them 41 carious teeth. 
(4) 44 • 5 per cent of the 36 women and old women examined at Gods 
lake had sound teeth. The 20 persons who made up the remain- 
ing 55-5 per cent had among them 41 carious teeth. 
(5) 36 per cent of the 58 men and old men examined at Oxford House 
bad sound teeth. The 37 persons who made up the remaining 
64 per cent had among them 138 carious teeth. 
The accompanying chart gives a very clear picture of the percentage 
distribution of decayed teeth. From the chart, and from the table above, 
it will be gathered that; 
(a) In a given neighbourhood the percentage of men affected with 
dental caries is practically equal to the percentage of women 
affected with dental caries. 
(b) At Island lake there was a much smaller percentage of persons 
with decayed teeth than at Gods lake, and at Gods lake there 
was an appreciably smaller number than at Oxford House, the 
percentages being respectively, 22 per cent, 58 per cent, 64 per 
cent. 
