THE BIOLOGY OF DAILY LIFE. 55 



(3) in hypalbuminosis, where the red cor- 

 puscles, like other elements, suffer from want of 

 albuminous material ; and (4) in chlorosis. 

 A little further on in the same article we come to : 



" (5) MOKBID CONDITIONS OF THE WHITE 



COEPUSCLES. The white corpuscles of the 

 blood may undergo certain morbid changes 

 both in number and appearance. 



" (a) The most remarkable of these is 

 increase in numbers, which may advance to 

 such a degree that the white corpuscles become 

 as numerous as the red. This condition is 

 known as leucocythaemia, or leukaemia. Short 

 of this, however, the proportion of white 

 corpuscles in the blood may be appreciably 

 increased, and to this minor condition the 

 name of leucocytosis has been applied. 



" Leucocytosis [remember this means only a 

 slight redundance of white corpuscles], ac- 

 cording to Virchow, accompanies almost 

 unexceptionally every case of lymphatic excite- 

 ment, such as inflammation, and tubercular, 

 scrofulous, or cancerous enlargement, or 

 swelling of the glands and allied structures 

 Peyer's glands, the solitary follicles, the spleen 

 and the tonsils. Leucocytosis is distinguished 

 from leucocythaemia by its very moderate 

 degree ; by its evanescent course ; by the 

 absence or deficiency of the red corpuscles, 

 and by the accompanying symptoms. Leucocy- 

 tosis may be appreciated even by the naked 

 eye in the clot of drawn blood, by the presence 

 of an irregular * lymphatic layer' crusta 



