The per-centages of increase taken for 30 years, at the rate between each interval, are 15¾ per cent., 24 per cent., 38¼ per cent., 67¾ per cent., and 60 per cent.
At the rate of increase from 1700 to 1750,
1000 would become in a century 1628, and would double in 140 years.
At the rate of increase from 1750 to 1801,
1000 would become in a century 2046, and would double in 96,8 years.
At the rate of increase from 1801 to 1811,
1000 would become in a century 2943, and would double in 64,2 years.
At the rate of increase from 1811 to 1821,
1000 would become in a century 5610, and would double in 40,2 years.
At the rate of increase from 1821 to 1831,