Ri:TRL>t:R[-SSl\'lC -IISSUIC CUANCHS. 2'iy 



combination with calcium, although carbonates and phosphates 

 are common ingredients. Uiliary calculi may form in the biiiarv 

 collecting tubules of the li\-er in the bile duct or in the gall blad- 

 der. Ihe results of their presence depend upon their location 

 and size. If they are small and cause no obstruction there will 

 be no inconvenience from them. If thev are of a size that they 

 can be forced through the bile ducts they will pniduce se\-ere 

 colicky pains at the time of passage. They may be sufficientlv 

 large to obstruct the bile duct of some principal collecting tulnile 

 and produce a stagnation and resorption of bile, resulting:' in 



Fig. 126. — Biliar.v Calculi, 



1. Sho^^ing Facets. 



2. Showing' Facets and I.aminatiun. 



Shu\\ins Cin\'ice. 



various disturbances because of the presence of the bile in the 

 blood. 



Lacteal Calculi ( galactoliths ) may be formed in the galacto- 

 phorus sinuses, particularly of the ox. They are usually com- 

 posed of calcium phosphate. 



Flilcbolitlis or calculi in veins have been observed by S])oon- 

 er in abdominal veins and by Simmonds in the jugular vein. 

 Thev are probably the result of calcification of thrombi which 

 have later become detached from the vessel walls and are true 

 calculi. They produce an obstruction in the vessels in which 



