34 MICROSCOPICAL DIAGNOSIS. 



by such observers as Virchow, Queckett, Paget, and others. Their 

 presence would be accidental and they would only corroborate a 

 diagnosis that must be clear at such a time in the advanced stage of 

 the disease. 



In examining blood it is well to remember that water causes the 

 red corpuscles to become spherical, dissolving out the coloring mat- 

 ter, and later, causes their total disintegration. Normal saline solu- 

 tion gives them the crenate or horse-chestm*t form. Tannic acid, in 

 a two per cent, solution, causes the haemoglobin to collect at the 

 periphery in the form of one or more round masses. 



