166 
J. L. ROBERTSON. 
shows a net-work of adenoid tissue with a considerable number 
of white blood cells. 
Bony Marrow .—Since Kanvier, in 1867, first described the 
lesions of the bony marrow, a number of cases have been observed, 
and it is now supposed that leucocythemia may arise from alter¬ 
ations in this tissue alone. The marrow appears more abundant, 
soft, greyish yellow. 
Liver. After the spleen and the lymphatic ganglions, the 
liver is more frequently affected. 10 Kilog in horse. 
Respiratory Apparatus .—Lungs are frequently invaded with 
lymphadinoma. 
In horses, the lesion is more usual as a diffuse infiltration of 
the inter-lobular connective tissue. Organ heavy; enlarged ; it 
floats ; it keeps its suppleness-—elasticity ; when you pass the 
hand on the surface you feel that the mass is full of firm produc¬ 
tions ; when cut, they give the sensation of a resisting fibrous 
tissue. They appear deep red at the bottom, witli dirty-white 
spots running together, giving the organ a look of lobulation. 
There is no enveloping membrane ; no central softening 
Ihe most manifest change of the blood in leucocythemia is the 
modification which is produced in the number and relation of the 
globular elements. By examining with the microscope a drop of 
blood, one is struck with the considerable number of white cor¬ 
puscles. The proportion is very variable, ordinarily 1-800, 900, 
or 1,000 in leucocythemia may rise to 1-85, 1-60, 1-12. 
The white corpuscles which are found in the blood can be re¬ 
duced to two general types—the first comprising large nucleated 
cells, or granular, possessed of amiboid movement, when one has 
extracted them from the circulation (leucocytes); the second 
being formed of free nuclei, colorless, strongly fixing the car¬ 
mine, immoveable, and of a diameter nearly equal to those of 
hematics (red globules—globulins). In certain forms of leucocy¬ 
themia tlici e docs not exist any globulins (splenic) j in others, on 
the contrary, they are predominant (ganglionic, intestinal). 
The blood which escapes from the vein is pale, serous, of a 
rosy hue—analagous to currant syrup diluted with water. It 
coagulates slowly; if it is received in a flat dish it is very quickly 
covered by a greyish or milky pellicle opaline, trembling. 
