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a radius of its limb, and at several parts I found the light polar- 
ized, the plane of polarization being always radial. Some of 
these observations Mr Ladd verified at the time. 
I detected no polarization when thick clouds were on the 
sun, either on the sun or in its immediate neighbourhood; but 
at a greater distance, 2 or 3 radii from the limb, I found polar- 
ization, and again the plane was normal to the limb. 
Observations during the Eclipse. 
I repeated these observations during the progress of the 
eclipse after first contact and before totality. At 11°. 8™, 10°. 
(11. 15. 30 G.m.t., time taken by Capt. Toynbee) just as the 
moon’s limb was in contact with a spot (the second of two spots 
near together) I found polarization on the moon’s limb: imme- 
diately after contact I found the same again. Later at 11", 32®. 
(11. 39. 20 G.M. T.) the polarization was more decidedly marked, 
and I determined its plane to be at an angle of 45° to the 
horizon. 
Again at 3™ before totality, when thick clouds came on, I 
found no polarization visible. 
Observations during and about Totality. 
1°. I watched for the first appearance of the corona in 
the East (apparently left) limb of the moon: this I saw at 
192. 740%, (12. 15 G.meT.), 
2°, I tested the corona for polarization before totality and 
found none. 
Note. This observation was not completed before totality ; 
in the course of it I heard from behind me a shout of “The 
Corona !” 
8° I tested the moon’s surface for atmospheric polarization. 
I found that it was visible and that its plane was the same as 
that I had determined before totality. 
4°. In the course of this observation I noticed that the 
brightness of the moon was very considerably more than I 
expected: not so much less than before totality. I agree in 
