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



idea recorded in my first communication on the corpuscles of the blood-f-, namely, 

 that the appearance of these corpuscles in inflammation is the same as that which 

 they present in vital turgescence of the vessels ; an appearance which seems to be 

 referable to changes effected by a process of the same kind as that above referred to. 

 In such portions of capillary network, the corpuscles are found to have assumed the 

 same colour as the pus-globules. The fragment in question contained what seemed 

 to be a pus-globule at a certain part ; and very possibly the other corpuscles in this 

 vessel had been destined to furnish globules of pus. The occurrence, however, of 

 pus-globules in the blood-vessels, I am aware is by no means new. 



107. " According to Henle," says Schwann, " the corpuscles of pus are not distin- 

 guishable from those of mucus J," Dr. Mandl's opinion, that these objects are iden- 

 tical, has been already mentioned. If then pus and mucus-globules are " identical," or 

 " not distinguishable," their source is not likely to be very different : and pus-globules 

 we have just seen to be derived from corpuscles of the blood. I would also compare 

 figs. 68 to 71. (mucus), with figs. 63 and 64. (pus) in this memoir, as well as with fig. 

 23. (blood-corpuscles) in my last paper §. See also figs. 72 and 73. in the present 

 communication. The blackish mucus from which these last were taken, presented, 

 not merely corpuscles having the same appearance as altered blood-corpuscles, but 

 such as resembled young corpuscles of the blood themselves, of the characteristic 

 colour, and in an unaltered state. 



108. Whether the highly refracting globules in the cells fig. 103. were those of fat, 

 I do not know ; but their appearance suggested the idea that this was the case ; and 

 the cells containing these globules were certainly altered corpuscles of the blood. 

 For a particular description of these cells, I refer to the explanation of the figures. 

 It may, however, be added here, that each of the globules resembling fat seemed to 

 occupy the central part of what had previously been discs. 



] 09. There are but few of the figures accompanying this memoir, which do not 

 directly or indirectly confirm the observations recorded in my last. Among those 

 affording direct confirmation of the same, may be mentioned figs. 75, 7^, 77, 78, 79, 

 80, 81, 82, 83, 84. Some of the blood-corpuscles in these figures exhibit discs, 

 existing both within and around the nucleus of the blood-corpuscle while in circula- 

 tion. Others (figs. 67 a. 76. 78.) seem to represent conditions of the " lymph-glo- 

 bules," or " corpuscles of the second form" of authors. 



110. The only views I am acquainted with, regarding the place which blood-cor- 

 puscles should be considered to occupy as "cells," are those of Schwann, and 

 Valentin. The former considers this corpuscle as a nucleated cell ; w^hile the latter 



t L. c, par. 48. fig. 20. + L. c. p. 80. 



§ On the Corpuscles of the Blood, Part IL I. c, p. 201. 



