| Show LAUGHING gaa interesting information aven by a dentist ile he describes the process by which the noer staff Is made blade its remarkable effects upon some people 1 I inhale about twenty gallons of laughing gas every day said a surgeon dentist who according to the new york mail and express makes a business of pulling teeth no I 1 dont do it for pleasure but for the purpose of showing patients how to take it the important tiling thing is to inflate the lungs with a few big breaths from the gas bag then complete unconsciousness supervenes supervened super venes and no pain whatever is is felt on the contrary the dreams of persons under the influence of nitrous oxide are usually most agreeable an irish girl L iel who came to me the other day to have a tooth extracted exclaimed on awaking awal cing sure I 1 thought I 1 was at a jakell A german told me that he be dreamed he was in a la lager ger beer saloon A little boy said that he thought he was up in the air holding on to the tail of a kite that enormous bag like a balloon which you saw dragged into the office a few minutes ago is filled with laughing gas it is made of canvas coated with rubber and holds two hundred gallons the quantity suffices cbs for only about twenty five patients because they waste a good deal from not amow ing 0 how to talce take it the stuff does not cost much to manufacture however it is made from nitrate of ammonia which is a salt obtained by boiling boil aug ammonia in nitric acid we buy it in granulated shape and all that is necessary in order to got get the eras from it is to boil it in water iu in the laboratory we put five or six pounds of it into a long necked flask beneath which is a lighted bunsen burner the flame is very hot because atmospheric air is rapidly supplied to it the nitrate of ammonia salt is melted in the flask and the gas which it gives off by evaporation passes over through a tube into a sealed scaled jar partly filled with water bubbling up through the water it passes through another tube into a second water jar and so through four jars successively being thus passed through water several times it is perfectly purified when n first generated it contains a good deal of impurity especially oxide of iron which comes from the iron vessels in which the ammonia was boiled with nitrate acid but all impurities are removed in the manner I 1 have described and the nitrous oxide finally goes through a pipe into a great metal tank the tank is composed of two big cylinders one partly filled with water and the other set upside down inside the first if you will take a tall tumbler and invert it inside of another tall tumbler that is slightly bigger and which has somo some water in it you will have the idea exactly I 1 the expansive power of the gas is so great that it lifts the inside cylinder steadily out of the outside one the water meanwhile keeping the nitrous oxide from escaping when the tank is filled the operator knows it by the height to which the cylinder is elevated to fill one of these huge rubber bags with the gas lie ile simply draws the gas oft off from the tank into the bag until the latter is completely inflated and can hold no more |
