Opinions which cannot be held “without grave personal sin”.

Optimism.

“Origin of Species”. —­effect of its publication. —­“a flash of light”. —­review in “Times”. —­criticism on the. —­influence of. —­“coming of age” of. —­difficulty of. —­and theory of evolution.

Original sin and Darwinism.

Orthodox Christianity, how regarded by many men of science.

Osborn, Professor Henry Fairfield. —­reminiscences quoted. —­account of Huxley at Oxford, 1894. —­description of his lectures. —­impromptu lecturing. —­simian characteristics of infants, story of Huxley.

Ossory, Mr., with Huxley in Egypt.

Owen, Sir Richard. —­introduction to. —­visits. —­supports claims of Huxley. —­at the Geological Club. —­his pay. —­as man of science. —­his “Parthenogenesis”. —­civility of. —­support for F.R.S. —­breach with. —­at Aberdeen British Association. —­his morphological speculations. —­the British Cuvier. —­style of, on the Ape question at Oxford. —­at Cambridge British Association. —­on air-cells of birds in flight. —­criticises Darwin on spontaneous generation. —­author of article on “Oken and the ‘Archetype’”. —­his books to be asked for by Dohrn. —­attack on Hooker.  —­Mrs. Carlyle’s saying about. —­death of. —­statue to. —­review of his work:  a piece of antiquity. —­review of, in “Nature”.

Owens College. —­governor of. —­opening of.

Oxford. —­compared with London.  —­Huxley refuses Linacre Professorship. —­invited to accept Linacre Professorship a second time. —­invited to be master of University College. —­receives D.C.L. —­science at. —­letter on chair of English Literature. —­addresses at, a contrast.

Oysters, on.

Paget, Sir James. —­address from, at Medical Congress. —­supports London University Reform.

Paleontology, work at. 
—­“The Method of Paleontology”.
—­rise and progress of.
—­would have led to invention of evolutionary hypothesis.

Paley, “Evidences”, and argument from design.

“Pangenesis”.

Pantheon, admiration of.

Parker, T. Jeffery. —­on Huxley and the practical teaching of biology. —­teaching by types. —­persuades him to change course of teaching. —­and to alter biological course.  —­“Encyclopaedia” work between H and L. —­impression of Huxley. —­as administrator. —­as lecturer. —­with his children.  —­Letter to:  —­book dedicated to him:  renewed vigour:  “cultivons notre jardin” the whole duty of man.

Parker, W.K. —­and the F.R.S.  —­Letters to:  —­bids him remodel his work on the Struthious skull. —­bird classification. —­the style of his Frog paper. —­work on the Amphibia. —­interest in the Invertebrata.

Parnell, C.S. —­his great qualities. —­retirement.

Parslow, Darwin’s old butler.

Pasteur, L., Huxley repeats his experiments on micro-organisms. 
—­Pasteur and pebrine.
—­typical of the century?