[580] Proc. Roy. Soc. Edin. VII, p. 391, 1872.
[581] The necessary existence of these recurring spirals is also proved, in a somewhat different way, by Leslie Ellis, On the Theory of Vegetable Spirals, in Mathematical and other Writings, 1853, pp. 358–372.
[582] Proc. Roy. Soc. Edin. VII, p. 397, 1872; Trans. Roy. Soc. Edin. XXVI, p. 505, 1870–71.
[583] A common form of pail-shaped waste-paper basket, with wide rhomboidal meshes of cane, is well-nigh as good a model as is required.
[584] Deutsche Vierteljahrsschrift, p. 261, 1868.
[585] Memoirs of Amer. Acad. IX, p. 389.
[586] De avibus circa aquas Danubii vagantibus et de ipsarum Nidis (Vol. V of the Danubius Pannonico-mysicus), Hagae Com., 1726.
[587] Sir Thomas Browne had a collection of eggs at Norwich, according to Evelyn, in 1671.
[588] Cf. Lapierre, in Buffon’s Histoire Naturelle, ed. Sonnini, 1800.
[589] Eier der Vögel Deutschlands, 1818–28 (cit. des Murs, p. 36).