414 
PLEURO-rNEUMONIA IN CATTLE. 
pears to prove it ; no opening is perceived in them. They 
are formed of a homogeneous, whitish matter, more or less 
hard, showing under the microscope granulous kernels and 
an innumerable quantity of small elementary corpuscles, 
which enjoy a molecular motion, and which are also met 
with in diseased lungs, as I shall show immediately. I have 
examined under the microscope parts of the lungs of animals 
diseased with pneumonia, at a magnitude of 540 times the 
diameter, which is much more considerable than that employed 
by Professor Gluge, in his beautiful anatomico-pathological 
researches upon pleuro-pneumonia. The exsudated matter 
presented no structure ; I met with no other anatomical 
elements than granulous kernels and elementary corpuscles, 
provided with a particular motion, the whole pretty much 
resembling an inflammatory exsudation, remarkable for its 
great quantity. The plastic exsudation is formed in so 
rapid a manner, and in such considerable quantity, that 
anatomical elements of a superior development to that of 
these kernels could not be produced in them ; consequently 
no cells or globules of pus (I have never found any) or fibres 
are ever met with there. The energy of the cellular tissue 
appears to exhaust itself upon too large a quantity of ex- 
sudated matter for the latter to be carried to a higher degree 
of organization. It is the same as is observed sometimes in 
the regeneration of the tissues ; in the section of nerves, for 
example, and in the fracture of bones ; when the exsudated 
liquid is in too large a quantity, or the fragments are too 
much separated, a part of the liquid being beyond the circle 
of action of the energy of the existing tissues, always remains 
at an inferior degree of development to that of the neigh- 
bouring tissues. What is most important to be shown here, 
and of which no one hitherto has spoken, is, the existence in 
diseased lungs of small corpuscles, endowed with a mole- 
cular motion, which appears sometimes to be made in a 
given direction. (See Fig. 2, p. 7.) They are like corpuscles 
in process of formation, the motion of which resembles that 
of the granules of pigment, as well as those which surround 
the corpuscles of the tuberculous matter in man. In all my 
microscopical researches I have constantly found the same. 
Wishing to know whether these corpuscles exist in any 
other substances than those already examined, I. submitted 
to the microscope : 
1. The saliva of a healthy ox under epizootic influence. 
2. The saliva of a diseased cow towards the third stage of 
the disease. 
3. The urine of the same cow. 
