As a result of this calamity, the population of Ireland decreased by 25%, or 2 million people, in the 1840s
[DOC] [TLE] Great Famine | Irish history | Britannica.com [PAR] Jan 28, 2016 ... Famine that occurred in Ireland in 184549 when the potato crop failed ... By the 
early 1840s almost half the Irish populationbut primarily the ... A heavy reliance 
on just one or two high-yielding types of potato greatly reduced the genetic ... 
About one million people died from starvation or from typhus and... [DOC] [TLE] The proximate cause of the Great Irish Famine - University College ... [PAR] Nov 25, 2004 ... WP04/25 ... population mainly reliant on the potato was enormous: 4-5 kilos ... an 
average daily intake of 4.6 lbs (or over two kilos) per man, woman, and child.