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SCIENCE 



[N. S. Vol. XXXVI. No. 928 



ever widening and increasing usefulness of 

 the station. 



Of all the many inspirations of Dohrn, 

 undoubtedly one of the happiest was the 

 subsidizing of the station by the introduc- 

 tion of his table-system, thus making the 

 institution international. Only in this way 

 was it possible to keep the organism free 

 from the dry husks of state tutelage, and to 

 give it sufficient flexibility to meet new con- 

 ditions, at the same time protecting it from 

 the inertia springing from self-satisfaction 

 or the possibility of retrogression by the 

 ever-recurring necessity for meeting these 

 needs. 



But we must also take into consideration 

 the reverse side of such fully adjusted 

 reactionary capacities: its vulnerability. 

 And here is the point at which our passive 

 feeling of gratitude can be changed into 

 active assistance. Every biologist, con- 

 vinced that the Naples station, on account 

 of its position and size, its catholicity of 

 spirit and richness in opportunities for 

 work, and, not least of all, because of its 

 international character, is of inestimable 

 value for our science, may, by openly 

 giving expression to this belief, help to 

 perpetuate the work as planned by its 

 founder. Let us look upon this institution 

 as a legacy from Dohrn which he has con- 

 fided to the care of each one of us. 



Even though we must grant that such a 

 valedictory as this fails in its chief aim, as 

 he in whose honor it is pronounced can not 

 hear it, we must console ourselves with the 

 thought that the men among whom Dohrn 

 lived had not left him in doubt as to the 

 esteem in which they held his work. Pew 

 men in our profession have been recipients 

 of such honors as were shown him by 

 princes and governments, by academies 

 and faculties, from the city in which he 

 worked, and from biologists all over the 

 world, as were shown him during the sta- 



tion's jubilee celebration. Even more 

 precious may have been to him the many 

 spontaneous expressions of sincere admira- 

 tion and grateful devotion. At the last 

 International Congress such marks of ap- 

 preciation were shown as to move him 

 deeply, and even without all this he had 

 only to reflect to become conscious of the 

 fact that he had given an impulse to biol- 

 ogy which could be equaled only by very 

 few, and that his deeds and his name would 

 continue to shine in the history of our sci- 

 ence far above, where only the highest sum- 

 mits are visible. We zoologists will take 

 pleasure in the thought that Anton Dohrn 

 belonged to us. 



Theodoe Boveei 

 University of Wubzbueg 



THE SCIENTIFIC WORK OF MISS N. M. 

 STEVENS 



Miss Stevens began her career as an in- 

 vestigator in 1901 at the age of forty years. 

 It is rare for one who starts so late in life 

 to attain in a few years so high a rank 

 amongst the leaders in one's chosen field. In 

 Miss Stevens's case this was made possible by 

 her natural ability and devotion to her work, 

 as well as by the liberality of Bryn Mawr Col- 

 lege, which created for her a research pro- 

 fessorship. Her investigations lay almost en- 

 tirely in the field of cytology, and covered not 

 only extensive studies of the germ cells, but a 

 memoir on the life cycle of one of the pro- 

 tozoa, and several papers on the histology of 

 regenerative processes in planarians and 

 liydroids. 



Modern cytological work involves an in- 

 tricacy of detail, the significance of which can 

 be appreciated by the specialist alone; but 

 Miss Stevens had a share in a discovery of 

 importance, and her name will be remembered 

 for this, when the minutiae of detailed inves- 

 tigations that she carried out have become in- 

 corporated in the general body of the subject. 

 In 1906 she found that the male of a beetle 

 (Tenehrio molitor) produced two kinds of 



