260 LAMPLAND— THE LOWELL OBSERVATORY 



In the present paper a brief account will be given of some pre- 

 liminary observations of the prominences, of coronal formations 

 over them, and of some of the complex structure of the inner 

 corona, shown in the series of photographs obtained by the Lowell 

 Observatory Eclipse expedition stationed at Syracuse, Kansas. 



The photographs were made with two of the historic "Transit 

 of Venus " objectives kindly loaned by the U. S. Naval Observa- 

 tory. These objectives have an aperture of five inches and a focal 

 length of 38.7 feet. They were mounted according to Schaeberle's 

 method. The tower camera and its moving plate carrier have been 

 so frequently described, and the method is so well and favorably 

 known among astronomers that no time will be taken here for the 

 discription of the apparatus. 



In connection with the description of some of the detail in the 

 Lowell Observatory photographs quotations and illustrations from 

 published observations of earlier eclipses will also be given, but such 

 references must necessarily be very brief and incomplete at this 

 time. It is thought that these comparisons should be both inter- 

 esting and instructive. 



A brief description will now be given of the more interesting 

 features of the Lowell Observatory photographs. 



P.A. Description of Detail. 



25° A coronal arch. No prominence visible. 



30°. 5 Brilliant short prominence. 



51°. 5 Large brilliant triangular-shaped prominence, base resting 

 on chromosphere. Fine series of coronal arches, four or 

 more, over this great prominence. Branches of the higher 

 arches not symmetrical with respect to prominence but as if 

 partially superposed from perspective displacement. 



99°. 5 Small bright prominence inclined (N. and W.) to solar 

 surface about 45°. It is centrally in great mass of brilliant 

 coronal matter. Indications of arches but detail cloud-like 

 or flocculent in parts. 



