In 1700 | In 1750 | In 1801 | In 1811 | In 1821 | In 1831
――――――- | ――――――- | ――――――- | ――――――- | ――――――- | ――――――-
105,800 | 135,000 | 194,500 | 216,667 | 257,447 | 301,017
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, 1000 would become in a
century 4776, and would double in 44,3 years.
The population of Cornwall being in 1831, according to the actual
census, 301,017, if it continued to increase accordingly for a century
at the rate ascertained between 1811 and 1821, the number of people in
1931 would amount to one million six hundred and eighty-eight thousand
six hundred and fifty!
A Table exhibiting the amount to which the population of a thousand
persons would amount in a century, and also the time of its doubling
for each 5 per cent. of increase in 30 years, the period given for
each parish from the Parliamentary Return.
――――――――――――――――――――――――――――――――――――――――+――――――――――――-+――――――――――――
A thousand, with the following increase,| Will become | Will double
in thirty years | in a century| in
――――――――――――――――――――――――――――――――――――――――+――――――――――――-+――――――――――――
5 per cent. increase in thirty years | 1176 | 426 years.
10 per cent. | 1374 | 218
15 per cent. | 1593 | 148
20 per cent. | 1836 | 114
25 per cent. | 2104 | 93,2
30 per cent. | 2398 | 79,2
35 per cent. | 2719 | 69,3
40 per cent. | 3070 | 61,8
45 per cent. | 3451 | 56
50 per cent. | 3863 | 51,3
55 per cent. | 4310 | 47,4
60 per cent. | 4791 | 44,2
65 per cent. | 5308 | 41,5
70 per cent. | 5874 | 39,2
75 per cent. | 6458 | 37,2
80 per cent. | 7094 | 35,4
85 per cent. | 7773 | 33,8
90 per cent. | 8495 | 32,4
95 per cent. | 9264 | 31,1
100 per cent. | 10080 | 30