The Relationship Between Certain Diseases of the Kidney.

With abnoormal putrefaction, the stools become very foul anid loose. Casein curds may be found as large as a small bean, tough, and insoluble in acetic acid and ether. It cannot be over-emphasized, however, that such curds are exceedinigly rare, and that the small curds which are found in the stools are composed not of proteini but of fat. Of course, the "mixed" type of stools, with one or other factor predominating, is that most commonly encountered. The stools of infanits fed on whey or buttermilk mixtures are greyish brown in colour and alkaline in reaction, The stools of the infant fed on Nestle's milk are pale and look rather like broken-up curd. Dextrinized and malted foods impart a browni colour and an acid reaction to the faeces. Bismuth salts, when given to adults, turn the stools black, owrng to the formation of bismuth sulphide. ln infants, this chemical change is exceptional. In acute gastro-enteritis the stools bccome loose, green and very foul. It should be noted, however, that in some of the worst cases the dejecta may closely resemble serum, and be almost odourless.