What is associated with: 1846 drs morton jackson for this used in surgery zzzz?

What is associated with: 1844 henry clay? What is associated with: 1844 was a good year for him he received a patent for his vulcanized rubber process? What is associated with: 1845 he is inaugurated as the 11th president? What is associated with: 1845 poem set in december at midnight in a chamber? What is associated with: 1846 heavy snowfall traps this carnivorous party in the sierra nevada mountains? What is associated with: 1846 included this party in the sierra nevada that only 45 people survived? What is associated with: 1846 saw the height of this irish blight? What is associated with: 1847 1922 the inventor youve reached has been disconnected?