374 



EXPERIMENTAL INFECTIONS DURING LIFE 



of the commoner laboratory animals, contrasted with 

 those of man, are inserted for reference. These have 

 been very kindly compiled for me by my friend and one 

 time colleague Dr. Cecil Price Jones. 



COMPARATIVE H^EMOCYTOLOGY OF LABORATORY 

 ANIMALS. 



The above table represents in each case the average 

 of a large number of counts. 



REMARKS. 



Frog. The red cells are large oval nucleated (20-25^ 

 by 12-15/4 discs, the nucleus relatively small and 

 irregularly elongated or oval, about IO/JL in length. 

 Many primitive and developing forms are usually ob- 

 served also free nuclei and many cells in various stages 

 of degeneration. Haemoglobin estimation is difficult 

 owing to turbidity of the blood after dilution with 

 water. The polymorphonuclear leucocytes are large 



