{ 240a} “Voyages of the _Adventure_ and _Beagle_,” vol. iii., p. 373. London, 1839.
{ 242a} See Professor Paley, “Fraser,” Jan., 1882, “Science Gossip,” Nos. 162, 163, June and July, 1878, and “Nature,” Jan. 3, Jan. 10, Feb. 28, and March 27, 1884.
{ 245a} “Formation of Vegetable Mould,” etc., p. 217. Murray, 1882.
{ 253a} “On the Growth of Trees and Protoplasmic Continuity.” London, Stanford, 1886.
{ 260a} Sometimes called Mendelejeff’s (see “Monthly Journal of Science,” April, 1884).
{ 261a} I am aware that attempts have been made to say that we can conceive a condition of matter, although there is no matter in connection with it—as, for example, that we can have motion without anything moving (see “Nature,” March 5, March 12, and April 9, 1885)—but I think it little likely that this opinion will meet general approbation.