ABSTRACTS 



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TERRESTRIAL MAGNETISM— On the results of some magnetic 

 observations during the solar eclipse of August 21, 1914- L. A. 

 Bauer and H. W. Fisk. Journ. Terr. Mag., 21 : 57-86. 1916. 



In response to a circular letter issued by the Director of the Depart- 

 ment of Terrestrial Magnetism, several observatories made observa- 

 tions during the eclipse of August 21, 1914, and forwarded their data 

 to Washington. The present paper comprises a compilation of ab- 

 stracts of the reports of the various institutions which supplied data, 

 and a discussion of the results. 



At the four stations, Eskdalemuir, Stonyhurst, Kew, and Rude 

 Skov, the maximum phase of the eclipse occurred at about the time 

 when the declination needle was approaching its maximum westerly 

 position for the day, and on examining the curves for these stations 

 it appeared that at each one of them a bay occurred a few minutes 

 before the time of maximum obscuration. As the result of this bay 

 the customary progression towards a westerly extreme was inter- 

 rupted, and a retrograde movement occurred, which continued for 

 some time. Of the above stations, the bay was most developed at 

 Rude Skov, the nearest one of the four to the belt of totality. 



On plotting a vector diagram for Rude Skov, with the north and 

 west components of the field as derived from the observed declinations 

 and horizontal intensities, it was found that during the eclipse the 

 regular course of the curve was interrupted and a loop was described. 

 The occurrence of this loop, which appeared also in the vector dia- 

 grams for Eskdalemuir and Kew, is in harmony with the similar effect 

 found at Rocky Mount, North Carolina, during the total eclipse of 

 May 28, 1900. 



Atmospheric-electric observations were furnished by Kew, Eskdale- 

 muir, and the Department of Terrestrial Magnetism. The conduc- 



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