REFERENCES AND QUOTATIONS. 



' Luthardt, Apologetische Vortrage. 7 Vortrag. P. 129. 



"^ Philosophia quaerit, theologia invenit, religio possidct veri" 

 tatem. 



^ Tageblatt der Naturforscher-Versammlung in Leipzig, 1872. 

 P. 12. The discourse was also printed separately. 



^ A. Fick, Physiologic, i860. 



* Any one who wishes to be more deeply instructed in tlic 

 problem of sensation, as an universal primary characteristic of tlie 

 constituent elements of matter, may be referred to the very lucid 

 and interesting work, " Das Unbewuste vom Standpunkt der 

 Physiologic und Desccndenztheorie" (Berlin, 1872). Published 

 anonymously. 



® L. Geiger, Ueber den Ursprung der Sprachc. (Stuttgart, 

 1869.) P. 207. 



^ Rollet, Ueber Elementartheile und Gewebe und dcren Unter- 

 scheidung. Rollet, Untersuchungen, etc. 1871. 



^ Karl Ernst v. Bar, Ueber Entwickclungsgcschichte der 

 Thiere, Beobachtung und Reflexion, 1828. 



® lb. I. 223. 



^0 lb. I. 230, &c. 



" Credner, Elemcnte der Geologic, 1872. P. 253. 



^'^ Agassiz, Essay on Classification, 1858. "It exhibits every- 

 where the working of the same creative Mind, through all times, 

 mid upon the whole surface of the globe." 



^^ Riitimeyer, Beitrage zur Kenntniss der fossilcn Pfcrde. 

 Verliandlung der naturibrschenden Gesellschaft in Basel, 1863. 

 III. 642. 



^^ The passages are from an occasional address — Oratio dc 

 ellure habitabili — contained in the Amocnitates acadcmira:. " Initio 



