l66 REPORTS OF I NVE;STI CATIONS AND PROJECTS. 



same order of magnitude as those obtained by Mr. J. E. Burbank, under the 

 auspices of the Department, in Labrador." In connection with the potential 

 gradient work some preliminary experiments were made. Investigations 

 will be continued on the remainder of the cruise. 



OFFICE WORK. 



The major part of the time of the office force at present available is con- 

 sumed in the duties involved in the administration and supervision of the 

 field work in progress and in the reduction of the current observations. It 

 is the constant endeavor to keep the office reductions apace with the field 

 work, for only in this way can defects in instruments and methods be detected 

 with desirable promptness and be immediately remedied. Thus the observer 

 in the field is ever in close touch with the office. 



The multitudinous reductions and computations for Cruises I and II of the 

 Galilee were completed, besides a number of related theoretical investigations 

 undertaken. As already stated, abstracts of the results of the observations 

 are promptly supplied to the institutions and persons interested. 



Assistance has been rendered the U. S. Coast and Geodetic Survey in the 

 preparation of the publication containing a compilation and discussion of the 

 results of the magnetic observations in the United States for the period 



1905- 



The major portion of the office investigations enumerated in the report of 

 last year, it is confidently hoped, will be completed and ready for publication 

 by the end of the calendar year. 



The report on the scientific work of the Ziegler Polar Expedition, a quarto 

 volume of 630 pages and 46 inserts, has been completed by Mr. Fleming out- 

 side of office hours, and is now being distributed by the National Geographic 

 Society to parties interested. The executors of the estate of William Ziegler 

 have turned over to the Department all the scientific observations and com- 

 putations of the expedition for safe-keeping and future reference. 



Numerous abstracts of recent publications have been prepared by various 

 members of the Department, particularly so in the field of atmospheric elec- 

 tricity by Mr. P. H. Dike. 



Addresses have been made by the Director before the Society of Arts, 

 Boston, Massachusetts, and also the Society of Engineers of Washington, 

 District of Columbia, describing in detail the operations of the Department. 



Publications of the Department have been regularly forwarded to inter- 

 ested parties in all parts of the world. 



