ON THE PATHOLOGICAL MORPHOLOGY OF SOME FLUIDS. 203 



Distilled water does not produce any change in it. 



Treated with nitric acid 1,170, it forms yellow filaments, decussating 

 among themselves in different directions, and marked with irregular, 

 obscure margins. Plate 6, fig. 83, b. 



The same happens if it have been treated with hydrochloric acid, 

 1,070. 



Solution of nitrate of silver 1,075, forms filaments, which after a little 

 time are dissolved. 



Contentrated acetic acid 1,030, T 



Solution of oxalic acid, > Occasion no change. 



Solution of tartaric acid, J 



Of Sputa generated by Anomalous Inflammation, and from the Tubercular 



Process. 



Sputa generated by the tubercular process, differ according to the 

 nature, the extent, and the stage of the disease. 

 The tubercular process is three-fold : 



1. Miliary tubercular process. 



2. The tubercular process of infiltration. And, 



3. The tubercular process, forming solitary tubercles, distinguishing 

 by turns the characteristic sputa which each process forms. 



Of Sputa ejected from the process forming Solitary Tubercles. 



A solitary tubercle, generating in the texture of the coats of the air- 

 tubes, or in the cellular tissue surrounding the bronchi or blood-vessels, 

 only affects the pulmonary secretion so as to increase it, and also presses 

 upon the coats of the intermediate and capillary blood-vessels, as well as 

 upon those of the minute bronchial ramifications, so much so as to impede 

 or totally put a stop to the circulation of the blood, as well as air in 

 that small portion of lung lying next the tubercle ; the product gene- 

 rated from the irritation of the mucous membrane, differs in no respect 

 from that of a mucous membrane irritated by the application of cold, 

 therefore there is as yet no qualitative difference between the sputa of 

 an incipient catarrhal process, and those of a commencing tubercular 

 process ; but a quantitive difference is given, for the sputa ejected from 

 an incipient catarrh, are more copious than those which were expec- 

 torated from the irritation of a solitary tubercle. 



The tubercle increasing the quantity of sputa increases until the 

 tubercle becomes softened, which having taken place, besides the con- 

 cocted or puri-form sputa, there are found yellowish-white and finely 



