302 ' ‘NATURE AND LIFE. 
taken place in them, two specimens of blood taken at two 
different points in the body. When we shall have mastered 
the composition of albumen, and when we shall have it in 
our power to make the comparison just alluded to, the 
problem of infectious diseases will not be long in coming 
into full light, and the cholera will be no more a dismal 
mystery. 
