I 16 ] 



, its natural products. 573 

 575. 



Young, Robert, his discovery of the 

 mtertereiice of light, 71 Q, 727. 



Zeni, the Fratelli, travels of, 611. 

 Zodiacal light, its discovery and scien 



tific results, 712, 713. 

 Zuniga, Juana de, wife of Cortea, 



647, 648. 



