INTENSITY OF CORONAL LIGHT DURING THE SOLAR ECLIPSE OF 1886. 383 
5. I found the concentric wire circles of great advantage, as the streamers, when 
judged by eye alone, appeared to be much longer than they really were; and, had it 
not been for this device, I feel sure I should have over-estimated the distance to which 
they extended. 
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6. Half an hour before the commencement of totality I sat down in the shade, and 
a quarter of an hour before I had my eyes bandaged with a double thickness of black 
cloth; on the signal being given, I removed the bandage and observed through the 
