Industrial Revolution in Scotland by 1800. In 1800, 17 per cent of people in Scotland lived in towns of more than 10,000 inhabitants. By 1850 it was 32 per cent and by 1900 it was 50 per cent. By 1900 one in three of the entire population were in the four cities of Glasgow, Edinburgh, Dundee and Aberdeen. Glasgow emerged as the largest city. Its population in 1780 was 43,000, reaching 147,000 by 1820; by 1901 it had grown to 762,000. This was due to a high birth rate and immigration from the countryside and particularly from Ireland; but from the 1870s there was
Largest organisms shorter than some other echinoderms. The longest echinoderm known is the conspicuous sea cucumber "Synapta maculata", with a slender body that can extend up to . In comparison, the biggest sea star is the brisingid sea star "Midgardia xandaros", reaching a span of , despite being quite slender. "Evasterias echinosoma" is another giant echinoderm and can measure up to across and weigh . The largest nemertean is the bootlace worm, "Lineus longissimus". A specimen found washed ashore on a beach in St. Andrews, Scotland in 1864 was recorded at a length of . Both the largest mollusks and the largest