7t 



resulted from good seeing. The longest extension of the corona that we 

 obtained was about three-fourths the sun's diameter. 



The exposures of one-half second with the GO-foot lens showed the 

 prominences overexposed, while the exposure of two seconds was too 

 sliort to register more than a suggestion of the inner corona. The ex- 

 posures given in the 50-inch camera, viz., 24 seconds, 29 seconds, 1S4 sec- 

 onds, and 25 seconds, were about right, and the results obtained with this 



Manuel, The Carpenter. 



lens are more satisfactory than any others with the short-focus lenses. 

 The exposures given in the portrait lens, viz., 2, 24, 29, 84, and 16 sec- 

 onds, were too long. All plates exposed except the fourth in the portrait 

 lens, which was a lantern slide, were Seed 27, and all were heavily 

 baclied to prevent halation. Of the small cameras the negatives of por- 

 trait lens, suffered most, because the part of the corona that ^^e hoped 

 they might contain was covered by the clouds. The negatives made with 

 the fifty-inch camera are particularly good and hold a wealth of complex 

 detail. An examination of these negatives shows that the coronal struc* 



