236 ON THE PATHOLOGICAL MORPHOLOGY OF SOME ANIMAL FLUIDS. 



globules are round or oblong, and exceed the diameter of the blood- 

 gobules once or twice. Plate 10, fig. 77. 



The ileum of patients dying on the fifteenth day of the disease, offers 

 infiltrated patches, covered here and there near the valve of Bauhinus, 

 with hard brittle greenish, or greyish-yellow, or brownish crusts, the 

 thickness of the crusts increases to half a line and beyond ; but the 

 thickness of the infiltrations from half a line to almost two lines. 



The crusts investigated by the microscope are composed of a substance 

 irregularly granulated. They adhere at first firmly to the infiltrated 

 patches ; but somewhat later they adhere slightly, and are easily sepa- 

 rated from them. 



The slightly adherent crust, being removed, leaves an ulcerous infil- 

 trated patch, whose margins are hard and elevated, but whose bottom 

 is uneven, hard, slightly excavated, and covered with a very little fluid 

 of a greyish colour. 



Under the microscope, round white globules are found in the fluid, 

 of which some are composed of a smooth envelope, enclosing the 

 smallest molecules, others of the smallest molecules only. Their dia- 

 meter exceeds twice or four times that of the blood-discs. Plate 10, 

 fig. 72. 



The infiltrated substance taken from the margins of the ulcer, offers, 

 under the microscope, conoid or elongated corpuscles, mostly in 

 the broader part, enclosing a central vesicle, their narrower part is 

 prolonged into a thin fibril ; intermixed among these, white, trans- 

 parent, round globules appear, four or six times larger than those 

 of the blood, and filled with the very smallest molecules. Plate 10, 

 fig. 73. 



The infiltrated substance taken from the bottom of the ulcer, con- 

 tains the same microscopic forms, Plate 10, fig. 74, (depicted close to- 

 gether.) 



The intestines, investigated on the twentieth day of the disease, exhi- 

 bit few entire, infiltrated patches, but many ulcers, partly covered with 

 crusts, partly clean excavations already freed from the crusts, the mar- 

 gins and the bottom being somewhat rough. 



On the twenty-fifth day of the disease, the margins are somewhat ele- 

 vated, the bottom of the ulcers appear but little rough, and here and 

 there a crust is still found. 



Those who die on the thirtieth day, exhibit ulcers with the bot- 

 tom somewhat depressed, thin smooth margins ; here and there fibres 

 of muscular membrane appear in the fundus ; in some the bottom is 

 closed by the peritonaeal membrane ; in others it is perforated, and 



