L 



Yemen, its natural products, 573 



575. 

 Young, Robert, his discoveiy of the 



interference of light, 716, 727. 



Zeni, the Fratelli, travels of, 611. 

 Zodiacal light, its discovery and scien 



tine results, 712, 713. 

 Zuniga, Juana de, wife of Cortez, 



647, 648. 



LOITDOW: 

 BY HARRISON AND SON', ST. MARTIN'S I.AJ 



