CHYLE, LYMPH, TRANS UDA TION8 AND EXUDATIONS. 127 



not constant, but varies in rest and in motion. In the last- 

 mentioned case the quantity of fluid is less, but the amount of the 

 mucin-like body, albumin, and of the extractive bodies is greater, 

 while the quantity of salts is diminished. This may be seen from 

 the following analyses by FRERICHS. The figures represent parts V 

 per 1000. 



I. Synovia from II. Synovia from 

 a btall-fed Ox. a Field-fed Ox. 



Water 969.9 948.5 



Solids 80. 1 51.5 



Mucin-like body 2.4 5.6 



Albumin and extractives 15.7 35.1 



Fat 0.6 0.7 



Salts 11.3 9.9 



The synovia of new-born babes corresponds to that of resting 

 animals. The fluid of the brusae mucosae, as also the fluid in the 

 synovial cavities around joints, etc., is similar to synovia from a 

 qualitative standpoint. 



III. The Pus. 



Pus is a yellowish-gray or yellowish-green, creamy mass of a 

 faint odor and an unsavory, sweetish taste. It consists of a fluid, 

 the pus-serum, in which solid particles, the pus-cells, swim. The 

 number of these cells varies so considerably that the pus may at 

 one time be thin and at another time so thick that it scarcely con- 

 tains a drop of serum. The specific gravity, therefore, may also 

 greatly vary, namely, between 1.020 and 1.040, but ordinarily it is 

 1.031-1.033. The reaction of fresh pus is generally alkaline, but it 

 may become neutral or acid from a decomposition in which fatty 

 acids, glycero-phosphoric acid, and also lactic acid are formed. 

 It may become strongly alkaline when putrefaction occurs with 

 the formation of ammonia. 



In the chemical investigation of pus the pus-serum and the 

 pus-corpuscles must be studied separately.. 



Pus-serum. Pus does not coagulate spontaneously nor after 

 the addition of defibrinated blood. The fluid in which the 

 pus-corpuscles are suspended is not to be compared with the 

 plasma, but rather with the serum. The pus-serum is pale yellow, 

 yellowish green, or brownish yellow, and has an alkaline reaction. 

 It contains, for the most part, the same constituents as the blood- 



