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experimentation as to make it an aid to research. He has 

 carried on field work in Montana and Nebraska, making 

 studies of the xerophytic and alpine floras and of geograph- 

 ical distribution. Dr. MacDougal has brought his investi- 

 gations on the relations of light to growth and development 

 into a form suitable for publication, and has directed the 

 operations of the laboratories. 



Dr. J. K. Small, curator of the museums, has carried for- 

 ward his work on the flora of the southeastern United States, 

 and made critical studies of a large number of genera occur- 

 ring in this region. Some field w r ork was done in southern 

 Florida in connection with these studies. The preparation of 

 his manual of the flora of this region has been carried steadily 

 forward and more than half of it has already been printed. 



Dr. P. A. Rydberg, assistant curator, has continued his 

 work on the flora of the Rocky Mountains and made critical 

 studies of £>iierciis, Limnorchis, Piferia and the Potentilleae. 



Mr. F. S. Earle, assistant curator, has devoted considerable 

 attention to the determination of collections of fungi from 

 Porto Rico, Florida, Colorado, Wyoming and California, and 

 made some critical studies of the Sphaeriales, Hysteriales 

 and Agaricaceae. 



Dr. M. A. Howe, assistant curator, has been engaged in 

 a general systematic study of the marine algae, upon which 

 he has made extensive field observations in Newfoundland and 

 Nova Scotia. 



Dr. A. Hollick, assistant curator, has made special studies 

 of the fossil flora of Long Island, and field observations on 

 flora of the sand dunes of Cape Cod, on the fossil flora of 

 Chappaquidick Island and of the Pleistocene flora of the 

 Chesapeake Bay region. 



Mr. G. V. Nash, head gardener, has continued his studies 

 of the American grasses, and of cultivated plants, making 

 visits to the Royal Gardens at Kew, and to the southern part 

 of Florida for the purpose of extending the range of his work. 



Miss A. M. Vail, librarian, has continued her studies of 

 the Asclepiadaeeae. 



