298 CARNEGIE INSTITUTION OF WASHINGTON. 



Certain phases of these inquiries had been developed in previous 

 work. For example, in the report of last year, the dynamic properties 

 of spheres of gravitative control were employed in the discussion of 

 certain observed peculiarities in the distribution of nebulae. So, in 

 a similar way, the horizon of the maximum accelerating power of 

 gravity in clusters of stars circulating about an open centroidal region 

 was brought into service as an auxiliary factor in determining the 

 distribution of nebulae. In earlier studies, the sphere of gravitative 

 control of the earth was made the basis of a study of the outward 

 extension and the dynamic state of the outermost atmosphere. During 

 the past year, however, studies in these lines have taken on a much 

 more definite form and have developed into specific inquiries into the 

 organic nature of cosmic units and into the availability of their essen- 

 tial properties in the solution of outstanding questions of a cosmologic 

 order. An outline of these studies has been in preparation for this 

 report of progress, but on account of its length and for other reasons 

 it is reserved for publication separately. 



HISTORY. 



Andrews, Charles M., Yale University, New Haven, Connecticut. Prepara- 

 tion of a general history of the colonies in America. (For previous reports 

 see Year Books Nos. 14-16.) 



No additional investigations in manuscript sources have been 

 pursued during the past year, but steady progress has been made in 

 arranging material and in planning the scope and character of individ- 

 ual volumes of the work. 



Osgood, Herbert L., Columbia University, New York. Completion of an 

 institutional history of the American colonies during the period of the French 

 wars. (For previous reports see Year Books Nos. 11-16.) 



At the time of Professor Osgood's death, September 11, 1918, the 

 work in question was nearly complete in four volumes. Since then the 

 Institution has made arrangements with Dr. Dixon R. Fox, a colleague 

 of Professor Osgood in the department of history of Columbia Uni- 

 versity, to undertake such additional contribution and supervision as 

 may benecessary to complete the project and prepare the manuscript 

 for the press. 



LITERATURE. 



Bergen, Henry, Brooklyn, New York. Research Associate in Early English 

 Literature. (For previous reports see Year Books Nos. 11-16.) 



During the last year Dr. Bergen has brought his work on the glossary 

 of the Troy Book to the point reached by the latest parts issued of 

 the Oxford Dictionary and has also continued the work of preparing 

 the manuscript of the glossary for the press. The latter part of the 

 year has been occupied in seeing the proofs of the Fall of Princes 

 through the press and in writing the side-notes for this text. 



