CHAPTER XVI

1875-1880. Metchnikoff at the age of 30--Lecturing in Odessa University, from 1873 to 1882--Internal difficulties-- Assassination of the Tsar, Alexander II.--Further troubles in the University--Resignation--Bad health: cardiac symptoms--Relapsing fever--Choroiditis--Studies on Ephemeridæ--Further studies on intracellular digestion-- The _Parenchymella_--Holidays in the country--Experiments on agricultural pests 96