Design, Darwin on. -examples of. -Lord Kelvin on.
Deslongchamps, L., on fertilisation of closed flowers.
Desmodium gyrans, Darwin's experiments on. -leaf movements.
Development, acceleration and retardation in. -floral. -importance of, in classification. -rate of. -sudden changes during.
Devonshire Commission, report on physiological investigation at Kew.
Devonshire, flora of.
Dewar, Prof., and Sir Wm. Thiselton-Dyer, on vitality of seeds in liquid hydrogen.
Diaheliotropism, F. Muller's observations.
Dialogue, title of paper by Asa Gray.
Diatomaceae, beauty of. -conjugation in.
Dicentra thalictriformis, morphology of tendrils.
Dichaea, fertilisation mechanism.
Dichogamy, Delpino on. -ignorance of botanists of, prior to publication of "Fertilisation of Orchids."
Dick, Sir T. Lauder, Survey of Glen Roy by.
Dickens, quotation from.
Dickson, Dr.
Dickson, W.K.
Dicotyledons, Heer on oldest known. -sudden appearance.
Didelphys.
Digestion, beneficial effect on plants.
Dillwyn, paper in "Gardeners' Chronicle."
Diluvium, tails of.
Dimorphism, in Cynips. -Darwin on. -difficult to explain. -and mimicry. -in parasitic plants. -Wallace on. -Walsh on. -Weismann on Sexual. -in Cicadas. -flowers illustrating. -Darwin knows no case in very irregular flowers. -in Melastomaceae. -in Linum. -in eight Natural Orders. -in Primula. -apparent cases due to mere variability. -explanation of.
Dingo.
Diodia.
Dioeciousness, origin of.
Dionoea, experiments on. response to stimuli. Curtis' observations on.
Dipsacus, F. Darwin on.
Dipterocarpus, survival during glacial period.
Direct action, arguments against. -Darwin led to believe more in. -Darwin's desire not to underestimate. -Darwin's underestimates. -facts proving. -Falconer on. -and hybridity. -importance of. -of pollen. -variation and.
Direction, sense of, in animals.
Disease, Dobell on "Germs and Vestiges" of.
Dispersal, (see also Distribution), of seeds. -of shells.
Distribution, Forbes on. -Hooker on Arctic plants. -of land and sea in former times. -of plants. -factors governing. -of shells. -Thiselton-Dyer on plant-. -Wallace on. -Blytt's work on.
Disuse, Darwin on. -effect of. -Owen on.
Divergence, Hooker on. -principle of.
Diversification, Darwin's doctrine of the good of.
Dobell, H., letter to.
Dogs, descent of. -experiment in painting. -expression. -habits. -rudimentary tail inherited in certain sheep-.
Dohrn, Dr., visits Darwin. -serves in Franco-Prussian war. -extract from letter to.
"Dolomit Riffe," Darwin on Mojsisovics'.
Domestic animals, crossing in. -Darwin's work on. -Settegast on. -variability of. -treatment in "Variation of Animals and Plants."
Domestication, effects of. -and loss of sterility.
Domeyko, on Chili.
Dominant forms.
Don, D., on variation. -mentioned.
Donders, F.C., on action of eyelids. -letters to.
Dorkings, power of flight.
Down, description of house and country. -Darwin's satisfaction with his house. -instances of vitality of seeds recorded from. -method of determining plants at. -Darwin on geology of. -observations on regular lines of flight of bees at.
Down (lanugo), on human body.
Dropmore.
Drosera, F. Darwin's experiments. -"a disguised animal." -Darwin's observations on. -Darwin's pleasure on proving digestion in. -effect of inorganic substance on. -experiments on absorption of poison. -Pfeffer on. -J. Scott's paper on. -response to stimuli. -D. filiformis, experiments on. -D. rotundifolia, experiments on.
Drosophyllum, vernation of. -Darwin's work on. -Drosophyllum lusitanicum, sent by Tait to Darwin. -used in Portugal to hang up as fly-paper.
Druidical mounds, seeds from.
Drummond, J., on fertilisation in Leschenaultia formosa.
Duchesne, on atavism.
Ducks, period of hatching. -skeletons. -hybrids between fowls and.
Dufrenoy, Pierre Armand: published "Memoires pour servir a une Description Geologique de la France," as well as numerous papers in the "Annales des Mines, Comptes Rendus, Bulletin Soc.