ORGANA AND ANORGANA. 5 
foundation ; and this is the reason why now it is commonly 
and exclusively (though not quite correctly) designated as 
Darwin's Theory. 
The great and really inestimable value of the Theory of 
Descent appears in a different light, accordingly as we 
merely consider its more immediate connection with organic 
natural science, or its larger influence upon the whole range 
of man’s knowledge of the universe. Organic natural 
science, or Biology, which as Zoology treats of animals, as 
Botany of plants, is completely reformed and founded anew 
by the Theory of Descent. For by this theory we are made 
acquainted with the active causes of organic forms, while up 
to the present time Zoology and Botany have simply been 
occupied with the facts of these forms. We may therefore 
also term the theory of descent a mechanical explanation of 
organic forms, or the science of the true causes of Organic 
Nature. 
As I cannot take for granted that my readers are all 
familiar with the terms “organic and inorganic nature,” 
and as the contrast of both these natural bodies will, in 
future, occupy much of our attention, I must say a few 
words in explanation of them. We designate as Organisms, 
or Organic bodies, all lwing creatures*eor animated bodies ; 
therefore all plants and animals, man included; for in them 
we can almost always prove a combination of various parts 
(instruments or organs) which work together for the purpose 
of producing the phenomena of life. Such a combination 
we do not find in Anorgana, or inorganic natural bodies— 
the so-called dead or inanimate bodies, such as minerals or 
stones, water, the atmospheric air, etc. Organisms always 
contain albuminous combinations of carbon in a semi-fluid 
