[68] Vide ‘Minutes of Proceedings of the Institution of Civil Engineers,’ vol. i. p. 131.
[69] This specification is the company’s own, as advertised when they first began business; for many reasons the boards have since been discontinued, and other alterations introduced into the system.
[70] I am unable to ascertain if this plan has ever been tried anywhere.
[71] It is also affirmed by the Borough Surveyor of Sunderland that this process dispenses with watering. Vide ‘Proceedings of the Association of Municipal and Sanitary Engineers and Surveyors,’ vol. iii. p. 72.
[72] Vide ‘A Practical Treatise on Roads, Streets, and Pavements,’ by Q. A. Gillmore, p. 166, which see also for a good account of wood pavements in the United States.
[73] Vide ‘Wood Pavements,’ by Henry Allnutt, 1880, p. 22.
[74] The power of absorbing water by wood varies from 9·37 to 174·86 per cent. in dry wood. In its ordinary state the power varies from 4·36 to 150·64 per cent. The quantity of water contained in wood in its natural state varies from 4·61 to 13·56 per cent. Vide ‘Minutes of Proceedings of the Institution of Civil Engineers,’ vol. lvi. p. 300.
[75] Vide ‘Roads and Roadways,’ by George Waller Wilcocks, 1879, p. 34.
[76] Vide ‘Minutes of Proceedings of the Institution of Civil Engineers,’ vol. lviii. p. 82.
[77] Ibid, vol. lx. p. 293.