94 REPORTS ON INVESTIGATIONS AND PROJECTS. 



CYTOLOGICAL INVESTIGATIONS. 



The results of the last three years confirm the belief in the im- 

 portance of the chromatic material in inheritance. This chromatic 

 material exhibits a bewildering complexity and diversity scarcely 

 less than that of adult organisms. It is of the greatest importance 

 to find the relation of chromatic diversity and somatic diversity. 

 Miss Lutz has made progress in this difficult and time-consuming 

 work (page 101). 



COOPERATION WITH OTHER INVESTIGATORS. 



It has been part of the plan of the station to come into friendly 

 and cooperative relations with workers in our field everywhere. 

 This idea has been carried out by the establishment of the two classes 

 of associates and correspondents, the former constituting a non- 

 resident staff of the station, the latter other workers in the same 

 field. We have added to the list of our correspondents the following : 



Prof. E. B. Poulton, of Oxford University, England. Professor 

 Poulton has long been known for his experimental researches upon 

 the adaptive significance of color-markings in animals and their con- 

 trol in many cases through direct stimulation. 



Mr. A. D. Darbishire, of Owens College, Manchester, England, who 

 has published a series of papers giving the results of his experiments 

 on breeding mice. 



The titles of a number of works in experimental evolution pub- 

 lished by our associates and correspondents and showing the present 

 trend of the science are given on pages 106 and 107. 



A large number of biologists have visited the station to view the 

 work or to consult on general methods or special points in their 

 work. We have gladly given much time to such inquirers. 



Miss Edith M. Brace, of the W T estern Maryland College, spent two 

 or three weeks at the station studying the physiology of the snake's 

 tongue. Mr. Ivey N. Lewis, of Johns Hopkins University, was 

 accommodated during about six weeks of the early spring while 

 making collections of Coleochaete, parasitic on the water-weed 

 Nitella, for further investigation. 



WORK OF SUBSIDIARY DEPARTMENTS. 

 The library is an important adjunct of the literary part of our 

 scientific work. An extensive library of biological literature, was 

 clearly out of the question ; moreover, it is not necessary on account 

 of our proximity to New York City. But one kind of a library has 

 been regarded as essential. Our isolation has demanded that we 

 should have a set of synoptic works on systematic and anatomical 



