REFERENCES AND QUOTATIONS. 
—_+—-. 
‘ Luthardt, Apologetische Vortrige. 7 Vortrag. P. 129. 
? Philosophia quaerit, theologia invenit, religio possidet veri- 
tatem. 
3 Tageblatt der Naturforscher-Versammlung in Leipzig, 1872. 
P.12. The discourse was also printed separately. 
4 A. Fick, Physiologie, 1860. 
5 Any one who wishes to be more deeply instructed in the 
problem of sensation, as an universal primary characteristic of the 
constituent elements of matter, may be referred to the very lucid 
and interesting work, “ Das Unbewuste vom Standpunkt der 
Physiologie und Descendenztheorie” (Berlin, 1872). Published 
anonymously. : 
®L. Geiger, Ueber den Ursprung der Sprache. (Stuttgart, 
1869.) P. 207. 
7 Rollet, Ueber Elementartheile und Gewebe und deren Unter- 
scheidung. Rollet, Untersuchungen, etc, 1871. 
8 Karl Ernst v. Bar, Ueber Entwickelungsgeschichte der 
Thiere, Beobachtung und Reflexion, 1828. 
® Ib. I. 223. 
WIb. I. 230, &c. 
“™ Credner, Elemente der Geologie, 1872. P. 253. 
® Agassiz, Essay on Classification, 1858. “It exhibits every- 
where the working of the same creative Mind, through all times, 
and upon the whole surface of the globe.” 
3 Riitimeyer, Beitrége zur Kenntniss der fossilen Pferde. 
Verhandlung der naturforschenden Gesellschaft in Basel, 1863. 
III. 642. 
4 The passages are from an occasional address—Oratio de 
ellure habitabili—contained in the Ameenitates academicz. “ Initio 
