THE HARVEST OF THE SEA. 193 



If no good pearls are found, at least the shells 

 are left, and many of these are sold for the manu- 

 facture of mother-of-pearl objects, such as fine 

 buttons and knife-handles. 



In conclusion, let me ask you to carefully ob- 

 serve the objects about you for a single week. I 

 am sure you will be surprised to find how many 

 of them came wholly or in part from the great 

 ocean that covers three fourths of the surface of 

 the world in which you live. 



BLACKBOARD WORDS. 



polulu (po-lu'lii), petroleum (pe-tro'le-ttm), thoroughly 

 (thur'o-ljOj skeleton (skeri-tun), chloride (klo'ridor klo'rid), 

 iodine (I'o-din), convenient (kon-ven'yent), evaporated 

 (e-vap'o-rat-ed), whalebone (hwarbon), precious (presh'tis). 



