422 NINETEENTH CENTURY. PT. in., 



his attention to it, moreover, we shall see in Chapter XLI. 

 that the theory of evolution, which has been worked out in 

 the last half of this century, has given quite a new interest 

 to the study of every living thing, so that all these facilities 

 ought to lead to a much more general knowledge than exists 

 at present, both as to the use of plants in our daily life, and 

 of their wonderful beauty. 



Chief Works consulted. Goethe's ' CEuvres Scientifiques ; ' Faivre ; 

 Asa Gray's 'Botany;' 'Sachs Geschichte der Botanik;' Robert Brown's 

 Works ; Proc. Linnoean Soc. Obituary of Robert Brown ; Von Mohl 

 in Wagner's * Handworterbuch der Physiologie ; ' Huxley's 'Physical 

 Basis of Life.' 



