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if Humphry Davy had not discovered nitrous oxide, the anesthesia would not exist today
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if Crawford Williamson he had not observed their peers, he would not have ideas for potential application to surgery
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if Wells had not wanted to check on yourself if nitrous oxide eliminated the pain, his assistant John Riggs would not practice dental extraction of a molar, without Wells complained.
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if Horace Wells had not observed the effects of the gas on volunteers and relief of pain, would not think of new anesthetic
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if Horace Wells had not seen use nitrous oxide to Professor Gardner, he could not exprimented with this gas
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if the assistant wells, william morton, had not had a patient with a tumor in the neck, the operation would not succeed
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if they had not found that although the patient fall asleep labor contractions continued normally, James Simpson and his partner Dunkan could not to practice first painless childbirth using chloroform
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Jonh Snow could not perfect the technique of application of chloroform when administered in small doses over the hand, if the ether had not caused side effects
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if Long had not proposed practice a surgery to James Venable for two small tumors that wished to be extirpated, would not have the knowledge of the effect of ether
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long duration operations would not have been possible, if the anesthesia had not exist