96 Mr. J. C. McConnel on the 







April 14, 



1888. 





G. 



r. s. 





10.10 A.M. 



36° 



•399 1-33 



At liighest point. 



10.20 



37 



•385 1-25 



jj }) 



10.40 



36 



•399 1-33 



jj jj 



10.50 



34 



•427 1-49 



Towards east, altitude 25°. 



11.0 



30 



•485 1-89 



Towards west, altitude 35°, 



11.30 



35i 



•406 1-37 



At highest point. 



At the time of these readings the snow, though rapidly 

 yielding to the sun, still covered the valley for a mile from 

 Thusis ; further north it had gone from the lower slopes as 

 well as the valley-floor, so that to east and west the country 

 was very white, while to the north there w^as a long stretch of 

 brown and to the south there lay the black woods. Thus the 

 snow was placed advantageously for diminishing the polari- 

 zation about noon. It is interesting to note the diminution 

 of the polarization looking over the snow to east and west. 

 The altitudes given w^ere estimated by eye. 



Two days afterwards the snow had gone for some distance 

 up the slopes, especially to the east, but the sky was not so 

 perfect ; there were a good many small cumuli near the 

 horizon. 



April 16. 





G. 



r. 



s. 





11.0 A.M. 



38^° 



•365 



1-15 



At highest point, 



11.30 



38| 



•361 



1-14 



jj }} 



Later on the clouds spread over the sky. 

 The next day tlie sky was practically cloudless and the snow 

 had gone rather more. 



April 17. 

 G. r. s. 



10.7 a.m. 40° -345 1-06 At highest point. 

 10.15 34| -416 1-43 To west, altitude 30°. 



10.23 40 ^345 1'06 At highest point. 



10.30 38i -365 1-15 „ „ 



10.35 39 -358 1*12 „ „ 



11.0 35 -413 1-41 To east, altitude 25°. 



12.15 38^ -369 1^17 At highest point. 



One may say, therefore, that the extra snow on the ground 

 on the 14th as compared with the 17th reduced the reading at 

 10.10 from 40° to 36° and at 11.30 from 38^ to 35^°. Of 

 course on the former day a good deal of snow disappeared 

 between 10 a.m. and 11.30 a.m. 



