BOTASIC GARDEXS. 21 



thence to the University of Berlin, where he vigorously continues 

 Ms researches. In consequence of his short stay but little of his 

 work was accomplished at Tubingen. 



The direction of the institute and garden was assnmed by Prof. 

 "vVilhelni Pfeffer in 1878 3 who remained in the place nine years. 

 The splendid results accomplished by himself and students dur- 

 ing that time are published in a set of two volumes entitled Un- 

 tersuchungen aus den botcrnische Institut zu Tiibingen. The work 

 dealt with the principal problems of physiology in growth, tur- 

 gescence, secretion, movements, respiration, and nutrition. In 

 1887 Pfeffer removed to Leipsic. Both before and after his stay 



View of Pax3i Horszs. Woek Boojis, aitd Hebbabtoi. rs" ArTOLS\ After a photolitho- 

 graph in " Die unter der Eegiening seiner ilajestat des Konigs Karl an der Tniversitilt 

 Tuhingen erriehteten und erweiterten Institut der natursvissensehafthehen und der medi- 

 zinisehen Fakultat,"' 1559. By permission. 



at Tiibingen he made most important contributions to the science, 

 especially with regard to the physical and chemical properties of 

 plant tissues, notably in osmosis and turgidity, and also in the 

 transf ormations of energy within the organism. His laboratories 

 and lecture room are thronged with students from all over the 

 world, many of whom are Americans. 



The present director of the institute and garden, Prof. Her- 

 mann Yochting, succeeded Pfeffer in 1887. Prof. Yochting may 

 be said to be to some extent a representative of the modern ideal- 

 istic school with which Braun, his old teacher, was identified. 

 His work, however, resembles that of the idealists only so far as 

 to exhibit the immense value of comprehensive discussions of the 

 results of careful inductive inquiry, not only in the establishment 



