Nitrous oxide, discovered by Priestley in 1772 and known always as "laughing gas," was an intoxicating entertainment. At parties, balloons of the stuff would be available for guests, and traveling shows would charge money for taking a snort of the gas and then make more money by exhibiting the intoxicated to audiences. Samuel Colt operated such an exhibition to finance the beginnings of his revolver factory. Another exhibitor was Gardner Quincy Colton, who brought laughing gas to Hartford, Conn., in 1844. A local dentist, Horace Wells, tried the gas and made a fool of himself in some unspecified way, according to his wife. A friend of Wells cut capers across the stage and banged up his knees against a settee. The friend felt nothing until the gas wore off. Wells made the connection from stage amusement to clinical tool, and, in the tradition of self-experimentation, had a colleague take out one of his teeth while he was under the gas, which Colton provided. After waking, Wells proclaimed, "I didn’t feel so much as the prick of a pin!"