242 



Mr. Gulliver's Contributions to the 



by examples. All the figures are magnified about 800 dia- 

 meters. 



Case 1. — A soldier, aged 22, 72nd Regiment, was admitted 

 into hospital with pulmonary consumption, on the 25th of 

 January, and died February 4th, 1842. Thirty-six hours pre- 

 vious to death he had pneuma- thorax, the .air having escaped 

 through an opening leading from a superficial vomica to the 

 cavity of the pleura. The lungs contained several vomicae 

 filled with what is commonly called softened tubercle, and lined 

 with the very common kind of friable and whitish false mem- 

 brane. The surface of the pulmonary pleura at a distance 

 from the opening was covered with a rather thin and tough 

 false membrane, and on the pleura nearer to the opening was 

 a more soft and friable exudation. 



Fig. 1. 



Fig. 2. 



Fig. 1. The structure of the toughish false membrane just 

 mentioned, made up of fibrils similar to those in clots of fibrine 

 either coagulated within or out of the body. At A'a portion 

 of the free surface is shown, and at B a portion of the attached 

 or pulmonary surface. Several very minute molecules per- 

 vade the false membrane ; at B there is an obscure appear- 

 ance of corpuscles among the fibrils, and with the aid of acetic 

 acid these corpuscles were clearly exposed. 



Fig. 2. The softer exudation from the same pleura. In 

 the upper part of the figure the corpuscles are held together 

 by an amorphous clot; just below several of them are floating 

 free in the serum, and at the bottom of the figure their nuclei 

 are clearly exposed by acetic acid. There were no minute 

 molecules either free or in the clot, though some of them were 

 observed in and on a few of the corpuscles. Compare this 

 with the friable exudation, fi g. 5, in which themolecules 

 were remarkably abundant. 



