m these merely technical drawings, Professor
Haeckel has made hundreds of paintings purely for recreation and the
love of it, illustrating--and that too often with true artistic feeling
for both form and color--the various lands to which his zoological
quests have carried him, such as Sicily, the Canaries, Egypt, and India.
From India alone, after a four-months' visit, Professor Haeckel brought
back two hundred fair-sized water-colors, a feat which speaks at once
for his love of art and his amazing industry.

I dwell upon this phase of Professor Haeckel's character and temperament
from the very outset because I wish it constantly to be borne in mind,
in connection with some of the doctrines to be mentioned presently, that
here we have to do with no dry-as-dust scientist, cold and soulless, but
with a broad, versatile, imaginative mind, one that links the scientific
and the artistic temperaments in rarest measure. Charles Darwin, with
whose name the name of Haeckel will always be linked, told with regret
that in his later years he had become so steeped in scientific facts
that he had lost all love for or appreciation of art or music. There has
been no such mental warping and atrophy in the mind of Ernst Haeckel.
Yet there is probably no man living to-day whose mind contains a larger
store of technical scientific facts than his, nor a man who has enriched
zoology with a larger number of new data, the result of direct personal
observation in field or laboratory.

How large Haeckel's contribution in this last regard has been can be
but vaguely appreciated by running over the long list of his important
publications, though the list includes more than one hundred titles,
unless it is understood that some single titles stand for monographs
of gigantic proportions, which have involved years of labor in the
production. Thus the text alone of the monograph on the radiolarians,
a form of microscopic sea-animalcule (to say nothing of the volume of
plates), is a work of three gigantic volumes, weighing, as Professor
Haeckel laughingly remarks, some thirty pounds, and representing twelve
years of hard labor. This particular monograph, by-the-bye, is written
in English (of which, as of several other languages, Professor Haeckel
is perfect master), and has a history of more than ordinary interest. It
appears that the radiolarians were discovered about a half-century
ago by Johannes Mueller, who made an especial-study of them, which was