22 CARNEGIE INSTITUTION OF WASHINGTON. 



Marine Biology : A. G. Mayer, director. 



Meridian Astrometry : Lewis Boss, director. 



Nutrition : F. G. Benedict. R. H. Chittenden, L,. B. Mendel, and T. B. Osborne. 



Solar Physics : George E. Hale, director. 



Terrestrial Magnetism : L. A. Bauer, director. 



Work in Geophysics : F. D. Adams, G. F. Becker, A. I^. Day. 



Referring to the individual reports of the directors and investigators just 

 named for matters of detail, the following summary remarks may serve to 

 indicate in a general way the present status and the prospective outcome of 

 departmental investigations. 



Immediately after the authorization of this department by the Trustees at 

 their meeting of December 12, 1905, the nomination of Dr. D. T. MacDougal 

 for the position of Director was approved by the Execu- 

 Department of ^.^^^ Committee. Dr. MacDougal accepted the position 

 and proceeded at once to take up the work already well 

 started at the Desert I^aboratory at Tucson, Arizona. During the year he 

 has enlarged the laboratory by the addition of a wing, affording much- 

 needed room ; secured a good water supply for laboratory use ; fenced in 

 the reservation of 840 acres set apart by the Territory of Arizona for the 

 laboratory, and provided several stations on near-by mountains for the study 

 of conditions of plant life at alpine heights. To this equipment on the 

 material side he has added an adequate staff of three resident investigators 

 and an efficient engineer. 



The provision thus made gives the department unrivaled opportunities 

 for the pursuit of research with respect to the flora of arid regions in par- 

 ticular, and this should contribute in an important degree to the progress 

 of botanical research in general. Attention is called to some noteworthy 

 papers, cited in the bibliography on pages 45-52, which have appeared 

 during the year from members of the departmental staff. 



The President desires to express his appreciation of the hearty spirit of 

 cooperation shown by Director MacDougal in assenting to the temporary 

 transfer of his engineer, Mr. Godfrey Sykes, to the staff of the Solar Observ- 

 atory on Mount Wilson. In an emergency case of road-building on this 

 mountain the services of Mr. Sykes have been specially opportune and 

 efficient. 



Under the energetic administration of Dr. Wright the large under- 

 taking of the Department of Economics and Sociology has made steady 

 progress during the year. About 130 collaborators are 

 Department of Econom- ^^ ^^^^ i^ ^^g ^ork, and many separate contributions 

 ics and Sociology. ° ° , ■, r ^ i- ^- t> • • c 



are now nearly ready for publication. Provision tor 



several volumes of reports and statistics prepared by the department has 

 already been considered by the Executive Committee. A noteworthy con- 

 tribution well under way is a bibliographic index to the public documents of 



