ON THE ORIGIN OF NEW SPECIES 
in horticulture and garden culture in relation 
to the improvement of the species, and it was 
accepted that the species had been produced 
in a similar way. At that time we were 
unacquainted with the results of sowing on 
such a scale as that of Burbank, and we 
imagined that the results could be reached 
only by repeated selections. However, it is 
clear that this view would lose a great deal 
of its meaning if by experiments upon a large 
scale the variability could be reached at once; 
that which we imagined previously could be 
reached only by slow degrees.” 
Dr. de Vries again mentions the fact that 
the scale of Mr. Burbank’s work excels’ 
everything that was ever done in the world 
before, and then describes the production by 
Mr. Burbank of the new species above referred 
to,—the primus berry, the first fixed species 
ever recorded made by man. As is noted 
elsewhere, Mr. Burbank has produced the 
mutations or changes which have been consid- 
ered to have such an important scientific 
bearing, at will. 
Now that it has been established, despite the 
dictum of the older scientists, that two variant 
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