[93] In Paris and other cities liable to civil war or internal commotions, it is contended as an advantage of asphalte that it cannot be used for the construction of barricades, breastworks, or rifle pits.
[94] Vide Mr. Haywood’s Report upon Asphalte and Wood Pavements, also Report on the Application of Science and Art to Street Paving and Cleansing of the Metropolis,’ and numerous other pamphlets and reports by eminent authorities upon the subject.
[95] Vide ‘Asphalte and its Application to Street Paving,’ by E. B. Ellice Clarke, ‘Proceedings of the Association of Municipal and Sanitary Engineers,’ vol. vi. p. 52.
[96] The asphaltic roadways of Paris, of which there were 290,000 square yards in the year 1878, cost from 10s. to 12s. per square yard to lay, and about 8·83 pence per square yard per annum to maintain, including the charge for renewing ¹⁄₁₅th part of the surface every year, which is the method adopted there. Vide ‘Annales Industrielles,’ 1878.
[97] Vide Mr. Haywood’s report on asphalte and wood pavements, 1874.
[98] “Lime concrete ruins compressed work.” Vide ‘Asphalte and its Application to Street Paving,’ by B. Ellice Clarke. ‘Proceedings of the Association of Municipal and Sanitary Engineers and Surveyors,’ vol. vi. p. 46.
[100] It must be ²⁄₅ths more in thickness than that specified as finished.