REPORTS ON INVESTIGATIONS AND PROJECTS. 



The following reports and abstracts of reports show the 

 progress of investigations carried on during the year, in- 

 cluding not only those authorized for 1906-1907 but others 

 on which work has been continued from prior years. 

 Reports of Directors of Departments are given first, fol- 

 lowed by reports of recipients of grants for other investi- 

 gations, the latter arranged according to subjects. 



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