In 1846, dentist William Morton demonstrated ether at Massachusetts General Hospital, pioneering what?

Henry Clay ran for president in 1844 as the nominee of which party? Who received a U.S. patent in 1844 for vulcanizing rubber? Who was inaugurated as the 11th U.S. president in 1845? Which 1845 poem is set "upon a midnight dreary" in bleak December in the narrator's chamber? In 1846, heavy snowfall trapped which pioneer party in the Sierra Nevada, where some resorted to cannibalism? Which blight struck Ireland's main crop in the 1840s, causing the Great Famine? Which inventor lived from 1847 to 1922? Winfield Scott won the 1847 Battle of Churubusco during which war?