22 proceedings: entomological society 



L. A. Bauer presented the fourth paper, by Bauer and Fisk, on 

 Results of magnetic observations during the solar eclipse of June 8, iqi8. 

 This paper was illustrated by lantern slides. 



The solar echpse of June 8, 1918, offered an exceptional opportunity 

 for rnagnetic and allied observations, since somewhat over one-third 

 of the belt of totality was situated in the United States. An inter- 

 esting circumstance was also the fact that this eclipse was the repeti- 

 tion of the one of May 28, 1900, in connection with which systematic 

 observations according to the first author's directions for the study of a 

 possible magnetic effect during a total solar eclipse, were made. In 

 response to the appeal sent out by the Department of Terrestrial 

 Magnetism of the Carnegie Institution of Washington, magnetic data 

 are available at present from seven stations within the belt of totality, 

 sixteen stations outside of the belt but within the zone of visibility 

 of the eclipse, and three stations outside of the zone; the stations 

 covered the region of the earth from China, Australia, and the Philip- 

 pines to Porto Rico. With a view to varying the conditions, the 

 station selected by ly. A. Bauer for his work was at Corona, Colorado, 

 the elevation of which is 11,500 feet; the changes in magnetic declina- 

 tion observed during the eclipse at this mountain station proved to be 

 of special interest. 



The various curves showing the results of the magnetic observations 

 at the different stations, as projected on the screen, showed a number of 

 extremely interesting features. It was pointed out that, in general, 

 the most notable effects revealed by the magnetic curves did not occur 

 according to absolute time nor according to local mean time, but fol- 

 lowed closely the times at which the eclipse occurred at the different 

 stations. The stations in the United States also revealed magnetic 

 effects before the time of the local eclipse, resulting evidently from the 

 easterly progression of the effects which had arisen in the portion of the 

 earth over which the eclipse had already occurred. Not only were 

 the conclusions reached with reference to the eclipse of May 28, 1900, 

 and subsequent eclipses, verified by the effects observed during the 

 eclipse of June 8, 191 8, but a number of additional facts have been 

 disclosed which will assist materially in the final analysis of this in- 

 teresting phenomenon. It was again shown that the magnetic fluctua- 

 tions observed during the eclipse are analogous in their nature to the 

 solar diurnal variation, differing from it chiefly in degree. 



Discussion: This paper was discussed by Mr. Abbot. 



Harvey h. Curtis, Recording Secretary. 



THE ENTOMOLOGICAL SOCIETY OF WASHINGTON 



The 317th regular meeting of the Society was held in the hall of the 

 Perpetual Building Association's Building, iioi E St., N. W., Decem- 

 ber 4, 1918. Twenty members were present. President Sasscer 

 presided. 



