s 



Fig. 4. — Photographs of the Loweb Cokona, taken with the 

 4-INCH (aperture), 16 Feet Focal Length Coronageaph 

 (upper) and a 4| De la Rue Coronagraph of 8 Feet 

 Focal Length (lower) of the Solar Physics Observa- 

 tory Expedition. 



