404 



Total Eclipse of the Sun, May 28, 1900. 



LIGHT CURVE of H ; 



(30-inch ref Lector). 



indications of becoming brighter than the more refrangible member. 

 These further photographs indicate that by April 4 the less refrangible 

 had become twice as intense. 



•''Total Eclipse of the Sun, May 28, 1900.— Account of the 

 Observations made by the Solar Physics Observatory Eclipse 

 Expedition and the Officers and Men of H.M.S. ' Theseus ' at 

 Santa Pola, Spain." By Sir Nokman Lockyek, K.C.B., F.B.S., 

 Eeceived May 21— Bead June 20, 1901. 



(Abstract.) 



The Report gives details as to the erection of coronagraphs, 

 prismatic cameras, and other instruments, and of the results obtained 

 by their use during the eclipse, which was observed under very favour- 

 able circumstances. Some of the more obvious results have already 

 been stated in a Preliminary Report,* and the following remarks may 

 now be added. 



A comparison of the photographs taken with the coronagraph of 

 16 feet focus with those taken about two hours earlier in America 

 indicates that while some of the prominences changed greatly in 

 appearance in the interval, no changes were detected in the details of 

 the corona. 



The spectrum of the chromosphere, as photographed with the 

 prismatic cameras, so greatly resembles that of 1898 that it has not 

 been considered necessary to make a complete reduction of wave- 



* 'Eoy. Soc. Proc.,' vol. 67, p. 341. 



