IOWA ACADEMT OF SCIENCES. 149 



At 8:35 a. m. the sky towards the west and northwest was 

 an intensely deep purple color, and in the east and southeast 

 a pale gray shade. Five minutes later the sky near the 

 zenith was a deep blue purple and light purplish-gray along 

 the far horizon, and during totality the colors in all direc- 

 tions were surpassingly beautiful; above, the sky was deep, 

 purplish-black, while along the distant horizon rose rings 

 of orange and gray, reminding one of a summer sunset. At 

 8:44 a. m. the shadow bands were observed as narrow, 

 tremulous, quickly moving parallel bars, which continued 

 until totality, and reappeared afterwards. 



PHOTOGRAPHS OF THE CORONA. 



I watched the disappearing crescent of sunlight through 

 the telescope, using the solar eye-piece until totality 

 began, when I immediately made an exposure of 1 second 

 on a Seed's 26x dry plate in the larger camera; reversed 

 the plate holder and made another exposure of about 5 



Figure 7. Photograph of the Corona of the solar eclipse of May 28, 1900. 



seconds, then opened the shutter of the smaller camera 

 expecting to close it just before totality ended. Unfortu- 

 nately I forgot it until some 10 seconds afterward, hence 

 the resulting negative was not very satisfactory. The 1 



