 Theobald Mathew's temperance campaign in 19th-century Ireland resulted in thousands of people vowing never to drink alcohol again.This led to the consumption of diethyl ether, a much more dangerous intoxicant — due to its high flammability — by those seeking to become intoxicated without breaking the letter of their pledge.It was thought that adding south-facing conservatories to British houses would reduce energy consumption by providing extra insulation and warmth from the sun.