600 Cf. Bashforth and Adams, Theoretical Forms of Drops, etc., Cambridge, 1883.
601 Woods, R. H., On a Physical Theorem applied to tense Membranes, Journ. of Anat. and Phys. XXVI, pp. 362ã371, 1892. A similar inôÙvesôÙtiôÙgaôÙtion of the tensions in the uterine wall, and of the varying thickness of its muscles, was attempted by Haughton in his Animal Mechanics, pp. 151ã158, 1873.
602 This corresponds with a determination of the normal pressures (in systole) by Krohl, as being in the ratio of 1ã₤:ã₤6ôñ8.
603 Cf. Schwalbe, G., Ueber Wechselbeziehungen und ihr Einfluss auf die Gestaltung des Arteriensystem, Jen. Zeitschr. XII, p. 267, 1878, Roux, Ueber die Verzweigungen der BlutgefûÊssen des Menschen, ibid. XII, p. 205, 1878; Ueber die Bedeutung der Ablenkung des ArterienstûÊmmen bei der Astaufgabe, ibid. XIII, p. 301, 1879; Hess, Walter, Eine mechanisch bedingte GesetzmûÊssigkeit im Bau des BlutgefûÊsssystems, A. f. Entw. Mech. XVI, p. 632, 1903; Thoma, R., Ueber die Histogenese und Histomechanik des BlutgefûÊsssystems, 1893.
604 Essays, etc., edited by Owen, I, p. 134, 1861.
605 On the Functions of the Heart and Arteries, Phil. Trans. 1809, pp. 1ã31, cf. 1808, pp. 164ã186; Collected Works, I, pp. 511ã534, 1855. The same lesson is conveyed by all such work as that of Volkmann, E. H. Weber and Poiseuille. Cf. Stephen Halesã Statical Essays, II, Introduction: ãEspecially considering that they [i.e. animal Bodies] are in a manner framed of one continued Maze of innumerable Canals, in which Fluids are incessantly circulating, some with great Force and Rapidity, others with very different Degrees of rebated Velocity: Hence, etc.ã
606 ãSizesã is Owenãs editorial emendation, which seems amply justified.
CHAPTER XVI ON FORM AND MECHANICAL EFFICIENCY
607 For a more elaborate clasôÙsiôÙfiôÙcaôÙtion, into colours cryptic, procryptic, anticryptic, apatetic, epigamic, sematic, episematic, aposematic, etc., see Poultonãs Colours of Animals (Int. Scientific Series, LXVIII), 1890; cf. also Meldola, R., Variable Protective Colouring in Insects, P.Z.S. 1873, pp. 153ã162, etc.
608 Dendy, Evolutionary Biology, p. 336, 1912.