PROBLEMS TO SOLVE. 



CHAPTER LIV. 



THE following Problems connected with Natural 

 History are a few of those which have interested me, 

 and which I commend to the attention of Naturalists 

 on the Riviera : 



Chapter I. Does it benefit a decaying palm-tree 

 to split the trunk vertically ? 



Chapter II. Can an orange be grafted on a 

 pomegranate ? 



Chapter III. Will an olive- seed germinate with- 

 out passing through the body of a bird ? 



Chapter VI. Are the seeds of the cultivated 

 Fig ever known to germinate ? 



Of what use, if any, is the Urginea to the Fig ? 



Is Broussonetia able to ripen its fruits on the 

 Riviera ? 



Is it the nature of the Celtis to have one 

 branch in full leaf and another equally healthy one 

 quite bare ? Or is this due to some defect of soil or 

 climate ? 



Chapter VII. Has the angle of ramification of 

 a given tree any relation to the average slope of the 

 ground to which that species is adapted ? 



Chapter VIII. Phyllotaxy of the cone of Pinus 

 pinaster ? 



