Surveying and Levelling Instruments, Theoretically and Practically Described. / For construction, qualities, selection, preservation, adjustments, and uses; with other apparatus and appliances used by civil engineers and surveyors in the field.

by William Ford Stanley

[2] See Phil. Trans. 1896, vol. 188, Map. 9.

[3] See Simms' Mathematical Instruments, p. 3.

[4] See pamphlet on A New Form of Levelling Instrument, by Thos. Cushing, F.R.A.S., 1879.

[5] Patent No. 69, Wm. Barrie, 1856.

[6] Patent No. 6742, John Browne, June, 1834.

[7] Brit. Assoc. Report, 1838, p. 154.

[8] Patent No. 12590, 1889.

[9] Colliery Guardian, vol. xxxviii. p. 576, 1879.

[10] A Treatise of the Principles and Practice of Levelling, by F. W. Simms, 1842; A Treatise on Land Surveying, by John Ainsley, revised by William Galbraith, 1849. Quite modern works—Aid to Survey Practice, L. D'A. Jackson, Crosby Lockwood, 1910; On Levelling and its General Application, by Thomas Holloway, Spon, 1887; revised 1914.

[11] Levelling, p. 49.