What is associated with: around 1807 john colter explored yellowstone after he was released from this duos expedition?

What is associated with: around 1784 85 henry cavendish discovered that when he combined hydrogen air it exploded produ… What is associated with: around 1800 parson weems wrote of this mans unauthorized juvenile lumberjacking? What is associated with: around 1800 this english romantic landscape painter took a studio at 64 harley street in londo… What is associated with: around 1800 this scientist from como italy developed a forerunner of the electric battery? What is associated with: around 1813 he set goethes gretchen am spinnrade to music? What is associated with: around 1814 pierre henri de valenciennes painted this catastrophic 79 ad event? What is associated with: around 1817 giovanni caviglia rescued the great sphinx from obliteration by this? What is associated with: around 1820 it was demonstrated that this element was effective in treating goiter?