PREFACE. IX 



of the Tiniverse, the origin of life, the nature of intelligence, 

 and the nature and ground of the moral sense, suggest questions 

 which, if they are to be answered at all, must he answered 

 from data which are not to he found in the visible world. It 

 is not from indifference to that class of questions, but rather 

 from a conviction of their transcendent importance, that I have 

 not entered on them in this work. I prefer to discuss them 

 in a distinct work, which is already commenced, and which, 

 unless a more appropriate title suggests itself to me, I purpose 

 to call " The Scientific Bases of Faith." 



Ol.D FOKGE, DUNMURET, Co. ANTRIM, 



J2)ril 8, 1869. 



