226 REPORTS OF INVESTIGATIONS AND PROJECTS. 



consin, Dr. Thomas Buck, of the University of Illinois, Prof. Frank Loxley 

 Griffin, of Williams College, Prof. William Raymond Longley, of Yale 

 University, and Dr. William Duncan MacMillan, of the University of 

 Chicago. The work is rapidly nearing completion, there being at present 

 600 type-written pages ready for the printer. The ultimate aim of this line 

 of work is the treatment of the problems actually presented in the solar 

 system by the rigorous methods of periodic orbits. In the present volume 

 the existence and construction of a great variety of periodic orbits are given, 

 and a number of practical problems are treated. 



GEOPHYSICAL RESEARCH. 



Becker, George F., U. S. Geological Survey, District of Columbia. Grant 



No. 226. Variation of the moduluses of elasticity and plasticity with 



temperature. (For previous reports see Year Books Nos. 3, 4, 5, 6, 



and 7.) $7,500- 



It is expected that the experimental investigations will be completed at the 



end of the present fiscal year and a complete report of the entire investigation 



will be issued as soon thereafter as practicable. 



LITERATURE. 



Sommer, H. Oskar, Camberley, Surrey, England. Grant No. 489. Prepa- 

 ration for publication of results of researches on Arthurian Romances. 

 (For previous reports see Year Books Nos. 5, 6, and 7.) $2,000. 



In accordance with your instructions and the rules of the Institution, I 

 have the honor to submit to you the following account of the work I have 

 done since the date of my last report: 



1. I revised 186 pages of volume I for the second time, and supplied side- 

 notes and head lines to these pages. 



2. I revised the whole of volume III, or 195 galleys, for the first time, 53 

 pages for the second time, and supplied these pages with side notes and 

 head lines. 



3. I revised 61 galleys of volume IV for the first time. 



4. I transcribed the whole of volume V from the manuscript Add. 10293 

 at the British Museum, supplied deficiencies, collated the text with six 

 other manuscripts, and prepared the whole for the press. 



5. I supplied the preliminary matter to volume I, preface, and introduction. 

 The latter gives but very briefly the result of my studies. The pamphlets 

 submitted to the members of the Executive Committee all represent work 

 connected with these studies on the origin and development of the Vulgate 

 Version. 



