205 
Now, the density of the population in this county (of 
Anglesey) has remained almost stationary, hut its mortality 
has increased, as shown by the following table : 
Density and Mortality in the Island of Anglesey in Three 
Decenniads. 
District. 
Density. 
Annual Mortality. 
PersoSs to a Square Mile. 
Deaths to 1,C00 Living. 
1841-50 
1851-60 
1861-70 
1841-50 
1851-60 
1861-70 
Anglesey 
3-41 
3T6 
3-36 
17 
19 
21 
Since the population of these districts has certainly im- 
proved in material comfort in the last 20 years, it is probable 
that a large part of the increased mortality may be fairly 
ascribed to the increased use of alcohol. A similar state- 
ment holds good with regard to other parts of Wales. 
If it were allowable to extend the analogy of these places 
to the whole of England, the stationary condition of the 
death-rate of the country would have to be accounted for by 
discovering some causes that had diminished the death-rate 
by at least two or three per 1,000, and had saved about 
40,000 or 50,000 lives every year. 
I cannot help thinking that in many parts of England 
this statement falls short of the truth, aud that we have to 
thank sanitary effort for saving the country from a still 
greater loss. 
3. The third element in the positive increase of the death- 
rate is the infant mortality. Now, this I have already 
included to some extent under the head of 'preventible mor- 
tality;’ but whilst it is, perhaps, more under the control of 
proper hygienic conditions than any other forms of death. 
