ZODIACAL LIGHT. 565 



feet above the level of the sea. The numerical results which 

 Houzeau was able to obtain, though certainly based upon 

 only a small number of observations, make it probable that 

 the major axis of the zodiacal light no more coincides- with 

 the plane of the Sun's equator, than the vapoury mass of the 

 ring whose molecular condition is unknown to us extends 

 beyond the Earth's orbit. (ScJimz. Astr. Naclir. No. 492.) 



