368 



Prof. II. H. Turner and Mi. H. K. 



Comparison with the oksei -vatim^ - -cured on other days at about 

 the same time of day as the eclipse, viz., 4.30, may be summarised 



graphic-ally ;is in the accompanying figure : 



Polarisation i.f the Sky. Algiers, 1900, May 26-28. 

 Plane of Polarisation. 



During the Tota.L EcLipse of the Sun. * * 



In Sunshine At same hour of the day. * > 



AUituc/e JO ' 



Horizon. 



E. 



Antisun. 



The results are of considerable interest in their bearing on the well- 

 known peculiarities in the phenomena of the polarisation of the sky 

 in the neighbourhood of " neutral points." 



It is a great satisfaction to be able to record these observations, 

 for though they are incomplete, yet they were successfully carried out 

 in spite of circumstances which would have upset many a practised 

 observer ; and the regret is all the greater that Mrs. Xewall had to 

 pay such a forfeit for her resolution, for she did not get more than a 

 glimpse of the eclipse. 



Of the nine Savart polariscopes used in these observations, four 

 were lent to me by the Council of the Royal Astronomical Society, 

 and three by Professor Lewis, through Mr. A. Hutchinson, of Pem- 

 broke College, Cambridge, who had arranged to come to Algiers, and 

 had volunteered assistance in the observations recorded in Section 2-> 

 of this Report, but was unfortunately prevented at the last moment v 

 by illness, from coming. 



