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

[32] Patent, prov., No. 1859, June, 1868; patent No. 3759, Dec., 1868.

[33] Report on Omnimeter, by Major G. A. Laughton, Superintendent, Bombay Revenue Survey.

[34] Proc. Inst. C.E., vol. xcii. part ii. p. 248, 1887–1888.

[35] Lister's Patent, No. 2375, 1864.

[36] Francis Barker's patent, No. 1926, 1881.

[37] British patent, No. 217, 1884.

[38] Posthumous Works, p. 502; also Animadversions to the Machina Cælestis of Helvetius, p. 49.

[39] Phil. Trans., vol. xlii. p. 155.

[40] Phil. Trans., vol. xxxvii. p. 147.

[41] Ibid. p. 340.