A PEDUNCULATED AND A SESSILE OAK. 
251 
Although this investigation does not lead to any very definite 
conclusion, results of some value may possibly be arrived at if the 
measurements are continued, preferably at equal intervals of (say) 
three years, for many years to come. 
The following references may be useful to anyone wishing to 
look up the literature of this subject. They are restricted to 
remarks on the comparative density or value of the wood of the 
two species, or to their rate of growth. I have not thought it 
necessary to refer to every edition of a work, and have quoted only 
those which I have seen. 
The “Durmast Oak” (the forester’s “dunmast,” from the dark 
colour of its acorns) is frequently referred to in this literature. 
It is a variety of Quercus sessiliflora , and has often been confounded 
with it. It is not recorded to occur in Hertfordshire. 
1696. Ray, J. Synopsis Methodica Stirpium Britannicarum. Ed. 2. 8vo. 
London, (p. 286.) Ed. 3, 1724. (p. 440.) 
1777. Lightfoot, J. Flora Scotica. 2 vols. 8vo. London. (Yol. ii, 
p. 582.) Ed. 2, 1789. (Yol. i, p. 582.) 
1786. Hunter, A., in Evelyn’s ‘ Silva.’ New ed. 2 vols. 4to. London. 
(Yol. i, p. 68.) 
1787. Withering, W. Botanical Arrangement of British Plants. Ed. 2. 
3 vols. 8vo. London, 1787-1792. (Yol. ii, p. 1084.) 
[1/91.] Nichols, T. Observations on the Propagation and Management of 
Oak Trees in general; . . . 8vo. Southampton, (p. 24 ) 
1792. Martyn, T. Flora Rustica. 2 vols. 8vo. London, 1792-94. 
(Yol. i, tt. 10-12.) 
1793. Nichpls, T. Methods proposed for decreasing the consumption of 
Timber, . . . 8vo. Southampton, (pp. 66-67.) 
1804. Smith, J. E. Flora Britannica. 3 vols. 8vo. London, 1800-04. 
(Yol. iii, pp. 1026-1027.) 
1804. Smith, J. E., and J. Sowerby. English Botany. 36 vols. 8vo. 
London, 1790-1814. (Yol. xix, p. 1342.) 
1807. Martyn, T., in Miller’s Gardener’s and Botanist’s Dictionary. [Ed. 9.] 
2 vols. Folio. (Vol. ii, pt. 2, art. Quercus , sp. 24.) 
1808. Smith, J. E., and J. Sowerby. English Botany. 36 vols. 8vo. 
London, 1790-1814. (Yol. xxvi, p. 1845.) 
1818. Yule, Dr. Report of the Committee for Experiments on the Naturali¬ 
zation of Useful and Ornamental Plants, under the Climate of Scotland. Mem. 
Caledonian Hort. Soc., vol. ii, pp. 355-430. (p. 376.) 
1820. Hamilton, Rev. G. J. An. Essay on Woods and Plantations. Trans. 
Highland Soc. Scotl., vol. v, pp. 187-494. (p. 295.) 
1828. Smith, Sir J. E. The English Flora. 5 vols. 8vo. London, 1824-36. 
(Yol. iv, pp. 148-150.) 
1830. Bree, Rev. W. T. Rarer Plants found in Warwickshire. Mag. Nat. 
Hist., vol. iii, pp. 162-167. (p. 166.) 
1831. Matthew, P. On Naval Timber and Arboriculture. 8vo. London, 
(pp. 31-33.) 
1832. Anon. Useful and Ornamental Planting. 8vo. London, (pp. 24, 114.) 
1833. Atkinson, W. Observations on the Quality of the Oak Timber produced 
in Great Britain. Trans. Hort. Soc. Lond ., ser. 2, vol. i, pt. 4, pp. 336-339. 
(pp. 336-338.) 
1834. Cooper, T. H. Botany of Sussex. 8vo. Lewes, (pp. 4-5.) 
1836. Bree, Rev. W. T. Further Notices respecting British Oaks, . . . 
Gardener's Magazine , vol. xii, pp. 571-579. (pp. 572, 579.) 
1838. Hooker, Sir W. J. British Flora. 2 vols. 8vo. London. (Yol. i, 
p. 411.) Ed. 5, 1842. (Yol. i, pp. 326-327.) 
