256 HAECKEL 



Bitter alone gave sufficient to found two pro- 

 fessorships at Jena for the express purpose of 

 teaching the science of phylogeny that Haeckel 

 had created. 



All through the period of his long stay at Jena 

 that followed we trace a series of continual holiday 

 journeys. In these journeys he used to collect 

 the best material for his professional research, 

 following the method he had learned from Miiller 

 at Heligoland, and had practised at Messina and 

 Lanzarote. At the same time these travels were, 

 like the earlier ones, the bath of eternal youth and 

 health for " the other soul in his breast " ; the 

 artist, the lusty wanderer, I might almost say the 

 inveterate Bohemian in him, was then allowed to 

 have his spell of song and gaiety. In Jena he 

 took deeper and deeper root as time went on. 

 There was something in him in this respect of a 

 Persephone impulse, an alternation of winter and 

 summer in his life. When the days of hard and 

 wearing work were past, he would have to rush 

 away into the free air, down to the blue sea, to far 

 and happy Nature. " Here I am a man dare be a 

 man." The duty of the zoologist of Miiller's 

 school to go down to the sea to work came to his 

 rich temperament, which included so much more 

 than mere " professional reasons," with a splendid 

 sense of Persephone-life : half his time in the cold 

 North studying animal skeletons ai\d dead bones 

 by the burning lamp, the other half in the glare of 

 the sun of reality, in living nature at its best. I 

 will only quote summarily a few dates of these 



