270 THE SECRETIONS: 



fever. In the twelve cases, with two exceptions, the urine was 

 constantly acid. In one of the exceptions the urine was alka- 

 line, and contained numerous crystals of ammoniaco-magnesian 

 phosphate. In six cases sediments of uric acid were formed 

 either spontaneously, or on the addition of an acid : in two 

 in which the symptoms were very intense, a little albumen 

 was present, but in each case it lasted only one day. The mean 

 specific gravity of the urine was 1021*4; the highest, and in this 

 case a sediment was deposited, was 1025-2. 



In gastric fever the urine is frequently turbid and junientous : 

 it usually contains urate of ammonia in suspension, and has an 

 acid reaction. An earthy flocculent sediment occurs as a urinary 

 crisis at the commencement of convalescence, the supernatant 

 fluid being clear. (Schonlein.) 



In mucous fever the urine is red and fiery, if the fever (which 

 at the commencement assumes the intermittent type, and which 

 only at a later period becomes continuous,) takes on a synochal 

 character. 



It is not unfrequently limpid and clear, as in hysterical cases, 

 and forms, especially if the affection has extended to the genito- 

 urinary mucous membrane, a mucous sediment. In those cases 

 in which the urine is limpid, it assumes the normal colour during 

 the progress to convalescence, and sediments are deposited which 

 gradually become thicker, and pass from a mucous to an earthy- 

 purulent character. (Schonlein). 



The urine in bilious fever is usually impregnated with bile- 

 pigment ; it is of a more or less brownish colour, and when a 

 thin layer is seen it appears of a citron-yellow tint : it differs, 

 however, with the degree of vascular excitement ; if the fever 

 has a synochal character the urine is dark and of a fiery-red 

 colour, if the fever is erethismic, which is frequently the case, 

 it is of a dark yellow or yellowish-brown colour, and in torpid 

 fever it is more or less brown, and not unfrequently mixed with 

 blood. The presence of bile-pigment may always be recog- 

 nized by the change of colour which succeeds the addition of 

 nitric acid. 



