DISEASES OP THE BLOOD. 149 



watery, oi a dirty yellow colour, highly offensive with a 

 peculiar odour, containing flocculi of lymph, and some- 

 times a little blood, and being expelled suddenly and with 

 great force at first, but later trickling away involuntarily. 

 The back is arched, the skin dry and tense, the loins are 

 tender, and emphysematous swellings occur, especially 

 about the back in the region of the loins. A similar dis- 

 engagement of gas takes place into the interlobular areolar 

 tissue of the lungs. Non-emphysematous tumours are 

 described as sometimes appearing about various parts 

 of the body. In some cases the secretion of milk is sud- 

 denly and completely arrested, but in others this fluid con- 

 tinues to be produced in small quantity, until an advanced 

 stage of the disorder, its " specific gravity being 

 diminished, its salines less plentiful, its fat increased, and 

 sometimes it is reddish and acrid." The urine is scanty, 

 often albuminous, and contains a diminished amount of 

 salines, but an increase of urea. The blood is dark and 

 coagulates imperfectly, has an excess of fibrin, and an 

 altered condition of its albumen. The conjunctiva, at first 

 reddened, produces acrid watery tears, which trickle down 

 the face and cause removal of the cuticle ; later the secre- 

 tion becomes gelatinous, accumulates at the inner canthus, 

 and the membrane becomes pale, saliva is produced in 

 considerable quantity, and the mucous membranes undergo 

 special and definite changes; the congestion above in- 

 dicated is succeeded by proliferation of the epithelium, 

 with an altered condition of the products. The buccal 

 mucous membrane about the lips, gums, and palate, pre- 

 sents elevations of some extent, which are considered to 

 be liable to be confounded with those lesions which occur 

 in foot-and-mouth disease. They are not due to separa- 

 tion of the epithelium from the corium, but to alterations 

 of the former. The yellowish masses of thickened epi- 

 thelium are but slightly adherent to the corium, and they 

 can be readily removed as branny scales, leaving patches 

 of highly vascular sensitive tissue, surrounded by the 

 white mucous membrane, as yet unaltered. These lesions 

 are first marked in the conical papillsB of the cheek and 



