en-systeme." He was called
as Professor to Freiburg im Breisgau in 1852; and to Munich in 1857, where
he remained until his death on May 10th, 1891. In the "Zeitschrift fur
wiss. Botanik," 1844-46, edited by Nageli and Schleiden, and of which only
a single volume appeared, Nageli insists on the only sound basis for
classification being "development as a whole." The "Entstehung und
Begriff" (1865) was his first real evolutionary paper. He believed in a
tendency of organisms to vary towards perfection. His idea was that the
causes of variability are internal to the organism: see his work, "Ueber
den Einfluss ausserer Verhaltnisse auf die Varietatenbildung. Among his
other writings are the "Theorie der Bastardbildung," 1866, and "Die
Mechanisch-physiologische Theorie der Abstammungslehre," 1884. The chief
idea of the latter book is the existence of Idioplasm, a part of protoplasm
serving for hereditary transmission. (From Dr. D.H. Scott's article in
"Nature," October 15th, 1891, page 580.)
-Darwin on his work.
-Essay on Natural Selection.
-on Hieracium.
-"Ueber Entstehung und Begriff der naturhistoriscehn Art."
-Weismann on work of.
-on arrangement of leaves.
-criticism of Darwin.
-on innate principle of development.
-on physiological nature of useful adaptations in plants.

Napier, Rt. Hon. J.R., speech at British Association (1861) on Darwin's
work.

Naravelia.

Narborough, Sir J., description of W. coast of S. America by.

Nascent organs, rudimentary and.
-wing of Apteryx as.

Natural classification.

"Natural Conditions of Existence," Semper's.

Natural History, Darwin's taste for.
-Darwin's contributions to.
-accuracy the soul of.
-Darwin urges F. Muller to write book on.

Natural History Collections, enquiry as to disposal by British Museum
Trustees of.

"Natural History Review," Lord Avebury on Walsh's paper on dimorphism.
-Bentham in the.
-Darwin's opinion of.
-Darwin reviews Bates in.
-Falconer in the.
-founding of.
-Huxley and.

"Natural Inheritance," Galton's.

Natural preservation, as substitute for Natural Selection.

"Natural Science," A.S. Woodward on Neomylodon in.

Natural Selection, accumulation of varieties by.
-and adaptation in orchids.
-Allen on slowness of action.
-Angraecum in relation to.
-Ansted on.
-applied to politics.
-and artificial.
-Bates' belief in.
-Bronn on.
-comparison with architecture.