Polarization of the Light of the Ski/. 511 



maximum and of horizontal maximum polarization. From 

 some few of these the general conclusion may be drawn, that, in 



Fis. III. 



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/ 







\ 



iabinet's 

 Point. 



8 



nn. 



\ 



Brewster's 

 Point, 



the best condition of the sky, when the point observed is in the 

 zenith the neutral angle is small; e.g. if the sun be high up, 

 Babinet's point and Brewster's point move up near to it. 

 Brewster infers that, if the sun were actually in the zenith, 

 the neutral points would coincide with it; but although he 



