DR. MARTIN BARRY ON THE CORPUSCLES OF THE BLOOD. 247 



single disc, or two or three discs. Where the discs of the nucleolus 

 lie one on the other, the degree of refraction is very small. /3. Similar 

 objects, as viewed after the addition of dilute spirit. Each of the two 

 lower ones has the appearance of being circumscribed by a membrane, 

 and is contained within a minute cell. The upper object presents three 

 layers of discs ; the outer layer being pale. 



Fig. 65. Man. Fragment of a capillary vessel, found in the pus of the preceding 

 figure. It is filled with altered corpuscles of the blood. The largest 

 corpuscle presented an appearance resembling that of the pus-globule. 

 (Acetic acid.) 



Fig. 66. Man. Altered blood-corpuscles, observed in fluid from abscesses. 



Fig. 67. Man. Altered blood-corpuscles, observed in fluid from the intestinal 

 canal, where the existence of pus was suspected (compare with fig. 63.). 

 a Corresponds, apparently, to the " lymph-globule" of authors. 



Fig. 68. Man. Globules and cells in mucus from the air-passages of a healthy 

 person. This mucus had in some parts a slight tinge of yellow. 

 (Acetic acid.) 



Fig. 69. Man. Globules and cells in mucus from the air-passages of a healthy 

 person. This mucus was a tenacious, colourless, pellucid fluid. (Acetic 

 acid.) 



Fig. 70. Man. Cells in mucus from the Schneiderian membrane. The discs blood- 

 red. (Acetic acid.) 



Fig. 71. Man. A later stage of apparently corresponding objects, taken from the 

 same part. (Acetic acid.) 



Fig. 72. Man. From blackish mucus of the air-passages, a. Corpuscle having 

 the same appearance as a young corpuscle of the blood ; blood-red. 

 |3. Mass of blood-red discs ; which had the appearance of an altered 

 corpuscle of the blood. Such also was the appearance of y, h, g, ^. 

 y In outline : colour blood-red. This object was elliptical, and pre- 

 sented an orifice at one end ; the orifice occupying the situation of the 

 depression existing when the corpuscle had a discoid form. The ob- 

 ject y was composed of discs, h, e. Similar objects ; but presenting 

 numerous black points. Some of these black points are seen to have 

 been in the centres of the discs, and others between the discs. The 

 orifice was less distinct in g ; but there was a pellucid part in the same 

 situation. ^. Outline of a later state of the last-mentioned object. 



Fig. 73. From the same mucus, a. Corpuscles, having the same appearance as 

 young corpuscles of the blood. They were of the characteristic colour 

 of blood-corpuscles, and exceedingly minute, but not the minutest 

 seen ; mere points having been observed in large number, of the same 

 colour, and apparently derived from the same source. |3. Outline of 



