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

[12] Deschanel's Natural Philosophy, by Prof. Everett, p. 1018, 1876.

[13] A Manual of Surveying for India, by Colonel H. L. Thuillier, C.S.I., F.R.S., etc., and Lieutenant-Colonel R. Smith. Thacker, Calcutta, 1875. (Now out of print).

[14] The illustration is taken from Die geometrischen Instrumente, Dr. G. Chr. K. Hunäus. Hanover, 1864.

[15] Digges's Pantometria, see p. 2.

[16] Gardiner's Practical Surveying, p. 59, 1737.

[17] Adam's Geometrical Essays, pp. 217–229, 1803.

[18] Civil Engineers' Pocket-Book, by J. C. Trautwine, C.E.

[19] Plate xiv., fig. 5. Geometrical Essays, Geo. Adams, 1803.

[20] Proc. Min. Inst., Cornwall, 1883, vol. i. p. 317.

[21] Patent No. 1592, April 1878.