Put a quantity of nitrate of ammonia into a flask, and apply the heat of a lamp, which must be gentle, and well regulated. The salt will in a short time liquify, and must then be kept quietly simmering, avoiding violent ebullition. The gas will be evolved, and rise through the neck of the flask, and may be collected in a bladder containing a small quantity of water, and should be allowed to stand a few hours, and shifted into another bladder, or silk varnished bag before it is used. Though this gas is not fitted to support life, yet it may be respired for a short time, and the effects produced by it upon the animal frame, are its most extraordinary properties. The effects of this gas, are in general, highly pleasurable, and resemble those attendant on the agreeable period of intoxication. Exquisite sensations of pleasure; an irresistible propensity to laughter; a rapid flow of vivid ideas; a strong incitement to muscular motion, are the ordinary feelings produced by it. And what is exceedingly remarkable, is, that the intoxication thus produced, instead of being succeeded by the debility subsequent to intoxication by ardent spirits, does, on the contrary, generally render the person who takes it, cheerful and high spirited for the remainder of the day.