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little as 30 gramms in 24 hours, but always twice as much as urea, it is freely miscible in all proportions with water and alcohol, whether neutral, acid or alcaline in reaction; its own reaction is very slightly alkaline, almost neutral. My preliminary investigations have led me to the conclusion that this body belongs to the group of alcohols of the aromatic series; at a temperature of about 80° Celsius it begins to split into several bodies be-1 on ging to the class of aromatic oxy acids, and if heated to above 120" Celsius, it leaves behind pure Carbon. This organic liquid has a characteristic odor; in fact, it is this constituent of urine, which is the cause of its specific odor. It is able to take up a large quantity of Oxygen with great facility: fifty cubic centimeter of the average human urine art' able to deoxydize two gramms (2,0) of Potassium Permanganate. When subjected for some length of time to the influence of 70"—80" Celsius, it loses in a great measure its capacity of taking up Oxygen. It does not take up all at once all the Oxygen which it is able to absorb, but does so with great avidity in the beginning, and gradually takes up less and less during equal periods of time; its capacity of absorbing Oxygen is not wholly extinguished before a lapse of about 20 days! This organic liquid is of the very greatest importance in the economy of nature, as the urea cannot be decomposed without its presence into NTT, (Ammonia) and CO, (Carbon-Dioxide), and thus within a limited period all organic matter would be changed into urea, which would remain in nature without any use, and consequently all vegetation and animal—as well as human life would cease sooner or later, for it is evident that the amount of organic matter existing upon this globe remains'the same no matter how the physical form and chemical constitution of this organic matter may become changed. Our newly found organic liquid being of a sticky nature adheres to the smallest particles of urea, takes up Oxygen in large quantities, which in turn acts upon urea, and thus is the principal cause of the amoniacal fermentation of urine. I have oxydized different urines with permanganates, leaving the latter in contact with the urine for one week, and found that such urine whose liquid organic component had been completely oxydized, does not undergo amoniacal fermentation. Furthermore, I have dissolved pure urea in ordinary, not sterilized water, and have found that the urea was not decomposed after five days, so that I could through addition of Nitric Acid convert this urea into Urea-Nitrat, just like any other fresh urea. It will undoubtedly be gratifying to all investigators to learn, that this wonderful product of animal body-metabolism is the Song sought cause of those complex toxic symptoms, which have been designated by the collective name of Uraemia, and to which have been attributed the awftd toxic phenomena, so frequently incidental with the puerperium. Rabbits weighing over one Kilogramm, have succumbed after about 8—10 hours to 4 or 5 Cubic Centimeter of this poison, showing symptoms resembling somewhat those of morphine poisoning; the animals remained quietly for hours on the same spot, turning now and then in a circle around the same point, being evidently extremely nauseated, lacking muscular power, being motionless, when held up by their ears, refusing food, though not having eaten for several hours, and dying amid